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Finding the Fourth Proportional to 487,691.80, 730,112.10 and 347,723.80

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Solution

The fourth proportional to 487,691.80, 730,112.10 and 347,723.80 is: 520,569.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,691.80 : 730,112.10 = 347,723.80 : x
  2. Step 2: Convert to fraction form
    487,691.80/730,112.10 = 347,723.80/x
  3. Step 3: Cross multiply
    487,691.80x = 730,112.10 × 347,723.80
  4. Step 4: Simplify right side
    487,691.80x = 253,877,353,837.98
  5. Step 5: Solve for x
    x = 253,877,353,837.98/487,691.80
  6. Step 6: Final answer
    x = 520,569.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.