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Finding the Fourth Proportional to 487,707.80, 730,136.10 and 347,739.80

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Solution

The fourth proportional to 487,707.80, 730,136.10 and 347,739.80 is: 520,593.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,707.80 : 730,136.10 = 347,739.80 : x
  2. Step 2: Convert to fraction form
    487,707.80/730,136.10 = 347,739.80/x
  3. Step 3: Cross multiply
    487,707.80x = 730,136.10 × 347,739.80
  4. Step 4: Simplify right side
    487,707.80x = 253,897,381,386.78
  5. Step 5: Solve for x
    x = 253,897,381,386.78/487,707.80
  6. Step 6: Final answer
    x = 520,593.24

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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.