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Finding the Fourth Proportional to 515,097.90, 711,019.17 and 351,637.47

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Solution

The fourth proportional to 515,097.90, 711,019.17 and 351,637.47 is: 485,385.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,097.90 : 711,019.17 = 351,637.47 : x
  2. Step 2: Convert to fraction form
    515,097.90/711,019.17 = 351,637.47/x
  3. Step 3: Cross multiply
    515,097.90x = 711,019.17 × 351,637.47
  4. Step 4: Simplify right side
    515,097.90x = 250,020,982,060.30
  5. Step 5: Solve for x
    x = 250,020,982,060.30/515,097.90
  6. Step 6: Final answer
    x = 485,385.36

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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.