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Finding the Fourth Proportional to 347.37, 521.13 and 103.92

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Solution

The fourth proportional to 347.37, 521.13 and 103.92 is: 155.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    347.37 : 521.13 = 103.92 : x
  2. Step 2: Convert to fraction form
    347.37/521.13 = 103.92/x
  3. Step 3: Cross multiply
    347.37x = 521.13 × 103.92
  4. Step 4: Simplify right side
    347.37x = 54,155.83
  5. Step 5: Solve for x
    x = 54,155.83/347.37
  6. Step 6: Final answer
    x = 155.90

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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.