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Finding the Fourth Proportional to 717,757.26, 990,505.98 and 391,068.60

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Solution

The fourth proportional to 717,757.26, 990,505.98 and 391,068.60 is: 539,675.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,757.26 : 990,505.98 = 391,068.60 : x
  2. Step 2: Convert to fraction form
    717,757.26/990,505.98 = 391,068.60/x
  3. Step 3: Cross multiply
    717,757.26x = 990,505.98 × 391,068.60
  4. Step 4: Simplify right side
    717,757.26x = 387,355,786,890.23
  5. Step 5: Solve for x
    x = 387,355,786,890.23/717,757.26
  6. Step 6: Final answer
    x = 539,675.19

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.