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Finding the Fourth Proportional to 404,236.80, 606,355.20 and 315,007.20

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Solution

The fourth proportional to 404,236.80, 606,355.20 and 315,007.20 is: 472,510.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,236.80 : 606,355.20 = 315,007.20 : x
  2. Step 2: Convert to fraction form
    404,236.80/606,355.20 = 315,007.20/x
  3. Step 3: Cross multiply
    404,236.80x = 606,355.20 × 315,007.20
  4. Step 4: Simplify right side
    404,236.80x = 191,006,253,757.44
  5. Step 5: Solve for x
    x = 191,006,253,757.44/404,236.80
  6. Step 6: Final answer
    x = 472,510.80

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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.