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Finding the Fourth Proportional to 387.02, 534.08 and 239.73

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Solution

The fourth proportional to 387.02, 534.08 and 239.73 is: 330.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    387.02 : 534.08 = 239.73 : x
  2. Step 2: Convert to fraction form
    387.02/534.08 = 239.73/x
  3. Step 3: Cross multiply
    387.02x = 534.08 × 239.73
  4. Step 4: Simplify right side
    387.02x = 128,035.00
  5. Step 5: Solve for x
    x = 128,035.00/387.02
  6. Step 6: Final answer
    x = 330.82

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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.