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Finding the Fourth Proportional to 347.91, 521.45 and 155.13

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Solution

The fourth proportional to 347.91, 521.45 and 155.13 is: 232.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.91 : 521.45 = 155.13 : x
  2. Step 2: Convert to fraction form
    347.91/521.45 = 155.13/x
  3. Step 3: Cross multiply
    347.91x = 521.45 × 155.13
  4. Step 4: Simplify right side
    347.91x = 80,889.93
  5. Step 5: Solve for x
    x = 80,889.93/347.91
  6. Step 6: Final answer
    x = 232.51

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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.