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Finding the Fourth Proportional to 479,721.20, 720,042.60 and 243,330.80

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Solution

The fourth proportional to 479,721.20, 720,042.60 and 243,330.80 is: 365,229.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,721.20 : 720,042.60 = 243,330.80 : x
  2. Step 2: Convert to fraction form
    479,721.20/720,042.60 = 243,330.80/x
  3. Step 3: Cross multiply
    479,721.20x = 720,042.60 × 243,330.80
  4. Step 4: Simplify right side
    479,721.20x = 175,208,541,892.08
  5. Step 5: Solve for x
    x = 175,208,541,892.08/479,721.20
  6. Step 6: Final answer
    x = 365,229.93

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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.