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Finding the Fourth Proportional to 515,279.07, 711,092.12 and 385,988.49

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Solution

The fourth proportional to 515,279.07, 711,092.12 and 385,988.49 is: 532,669.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,279.07 : 711,092.12 = 385,988.49 : x
  2. Step 2: Convert to fraction form
    515,279.07/711,092.12 = 385,988.49/x
  3. Step 3: Cross multiply
    515,279.07x = 711,092.12 × 385,988.49
  4. Step 4: Simplify right side
    515,279.07x = 274,473,371,719.76
  5. Step 5: Solve for x
    x = 274,473,371,719.76/515,279.07
  6. Step 6: Final answer
    x = 532,669.36

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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.