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Finding the Fourth Proportional to 347.80, 521.43 and 239.26

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Solution

The fourth proportional to 347.80, 521.43 and 239.26 is: 358.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.80 : 521.43 = 239.26 : x
  2. Step 2: Convert to fraction form
    347.80/521.43 = 239.26/x
  3. Step 3: Cross multiply
    347.80x = 521.43 × 239.26
  4. Step 4: Simplify right side
    347.80x = 124,757.34
  5. Step 5: Solve for x
    x = 124,757.34/347.80
  6. Step 6: Final answer
    x = 358.70

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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.