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Finding the Fourth Proportional to 487,129.80, 730,694.70 and 310,420.20

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Solution

The fourth proportional to 487,129.80, 730,694.70 and 310,420.20 is: 465,630.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,129.80 : 730,694.70 = 310,420.20 : x
  2. Step 2: Convert to fraction form
    487,129.80/730,694.70 = 310,420.20/x
  3. Step 3: Cross multiply
    487,129.80x = 730,694.70 × 310,420.20
  4. Step 4: Simplify right side
    487,129.80x = 226,822,394,912.94
  5. Step 5: Solve for x
    x = 226,822,394,912.94/487,129.80
  6. Step 6: Final answer
    x = 465,630.30

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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.