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Finding the Fourth Proportional to 347.81, 521.72 and 239.27

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Solution

The fourth proportional to 347.81, 521.72 and 239.27 is: 358.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.81 : 521.72 = 239.27 : x
  2. Step 2: Convert to fraction form
    347.81/521.72 = 239.27/x
  3. Step 3: Cross multiply
    347.81x = 521.72 × 239.27
  4. Step 4: Simplify right side
    347.81x = 124,831.94
  5. Step 5: Solve for x
    x = 124,831.94/347.81
  6. Step 6: Final answer
    x = 358.91

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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.