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Finding the Fourth Proportional to 659,808,861.80, 989,713,292.70 and 655,777,783.40

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Solution

The fourth proportional to 659,808,861.80, 989,713,292.70 and 655,777,783.40 is: 983,666,675.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,808,861.80 : 989,713,292.70 = 655,777,783.40 : x
  2. Step 2: Convert to fraction form
    659,808,861.80/989,713,292.70 = 655,777,783.40/x
  3. Step 3: Cross multiply
    659,808,861.80x = 989,713,292.70 × 655,777,783.40
  4. Step 4: Simplify right side
    659,808,861.80x = 649,031,989,288,321,408
  5. Step 5: Solve for x
    x = 649,031,989,288,321,408/659,808,861.80
  6. Step 6: Final answer
    x = 983,666,675.10

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.