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Finding the Fourth Proportional to 407.50, 562.28 and 239.47

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Solution

The fourth proportional to 407.50, 562.28 and 239.47 is: 330.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    407.50 : 562.28 = 239.47 : x
  2. Step 2: Convert to fraction form
    407.50/562.28 = 239.47/x
  3. Step 3: Cross multiply
    407.50x = 562.28 × 239.47
  4. Step 4: Simplify right side
    407.50x = 134,649.75
  5. Step 5: Solve for x
    x = 134,649.75/407.50
  6. Step 6: Final answer
    x = 330.43

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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.