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Finding the Fourth Proportional to 717,755.87, 990,547.18 and 395,465.89

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Solution

The fourth proportional to 717,755.87, 990,547.18 and 395,465.89 is: 545,767.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,755.87 : 990,547.18 = 395,465.89 : x
  2. Step 2: Convert to fraction form
    717,755.87/990,547.18 = 395,465.89/x
  3. Step 3: Cross multiply
    717,755.87x = 990,547.18 × 395,465.89
  4. Step 4: Simplify right side
    717,755.87x = 391,727,618,660.66
  5. Step 5: Solve for x
    x = 391,727,618,660.66/717,755.87
  6. Step 6: Final answer
    x = 545,767.21

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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.