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Finding the Fourth Proportional to 659,609.40, 989,414.10 and 655,672.80

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Solution

The fourth proportional to 659,609.40, 989,414.10 and 655,672.80 is: 983,509.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,609.40 : 989,414.10 = 655,672.80 : x
  2. Step 2: Convert to fraction form
    659,609.40/989,414.10 = 655,672.80/x
  3. Step 3: Cross multiply
    659,609.40x = 989,414.10 × 655,672.80
  4. Step 4: Simplify right side
    659,609.40x = 648,731,913,306.48
  5. Step 5: Solve for x
    x = 648,731,913,306.48/659,609.40
  6. Step 6: Final answer
    x = 983,509.20

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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.