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Finding the Fourth Proportional to 372.11, 557.84 and 155.43

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Solution

The fourth proportional to 372.11, 557.84 and 155.43 is: 233.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    372.11 : 557.84 = 155.43 : x
  2. Step 2: Convert to fraction form
    372.11/557.84 = 155.43/x
  3. Step 3: Cross multiply
    372.11x = 557.84 × 155.43
  4. Step 4: Simplify right side
    372.11x = 86,705.46
  5. Step 5: Solve for x
    x = 86,705.46/372.11
  6. Step 6: Final answer
    x = 233.01

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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.