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Finding the Fourth Proportional to 401,778.72, 554,472 and 240,660

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Solution

The fourth proportional to 401,778.72, 554,472 and 240,660 is: 332,121.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    401,778.72 : 554,472 = 240,660 : x
  2. Step 2: Convert to fraction form
    401,778.72/554,472 = 240,660/x
  3. Step 3: Cross multiply
    401,778.72x = 554,472 × 240,660
  4. Step 4: Simplify right side
    401,778.72x = 133,439,231,520
  5. Step 5: Solve for x
    x = 133,439,231,520/401,778.72
  6. Step 6: Final answer
    x = 332,121.20

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.