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Finding the Fourth Proportional to 371.86, 558 and 155.38

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Solution

The fourth proportional to 371.86, 558 and 155.38 is: 233.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    371.86 : 558 = 155.38 : x
  2. Step 2: Convert to fraction form
    371.86/558 = 155.38/x
  3. Step 3: Cross multiply
    371.86x = 558 × 155.38
  4. Step 4: Simplify right side
    371.86x = 86,702.04
  5. Step 5: Solve for x
    x = 86,702.04/371.86
  6. Step 6: Final answer
    x = 233.16

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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.