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Finding the Fourth Proportional to 364.28, 502.56 and 239.78

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Solution

The fourth proportional to 364.28, 502.56 and 239.78 is: 330.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    364.28 : 502.56 = 239.78 : x
  2. Step 2: Convert to fraction form
    364.28/502.56 = 239.78/x
  3. Step 3: Cross multiply
    364.28x = 502.56 × 239.78
  4. Step 4: Simplify right side
    364.28x = 120,503.84
  5. Step 5: Solve for x
    x = 120,503.84/364.28
  6. Step 6: Final answer
    x = 330.80

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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.