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Finding the Fourth Proportional to 717,892.43, 990,689.49 and 395,602.45

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Solution

The fourth proportional to 717,892.43, 990,689.49 and 395,602.45 is: 545,930.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    717,892.43 : 990,689.49 = 395,602.45 : x
  2. Step 2: Convert to fraction form
    717,892.43/990,689.49 = 395,602.45/x
  3. Step 3: Cross multiply
    717,892.43x = 990,689.49 × 395,602.45
  4. Step 4: Simplify right side
    717,892.43x = 391,919,186,956.53
  5. Step 5: Solve for x
    x = 391,919,186,956.53/717,892.43
  6. Step 6: Final answer
    x = 545,930.24

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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.