Home / 659,808,856.80-989,713,285.20-655,777,778.40

Finding the Fourth Proportional to 659,808,856.80, 989,713,285.20 and 655,777,778.40

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Solution

The fourth proportional to 659,808,856.80, 989,713,285.20 and 655,777,778.40 is: 983,666,667.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,808,856.80 : 989,713,285.20 = 655,777,778.40 : x
  2. Step 2: Convert to fraction form
    659,808,856.80/989,713,285.20 = 655,777,778.40/x
  3. Step 3: Cross multiply
    659,808,856.80x = 989,713,285.20 × 655,777,778.40
  4. Step 4: Simplify right side
    659,808,856.80x = 649,031,979,421,421,568
  5. Step 5: Solve for x
    x = 649,031,979,421,421,568/659,808,856.80
  6. Step 6: Final answer
    x = 983,666,667.60

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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.