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Finding the Fourth Proportional to 386.54, 580.05 and 158.54

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Solution

The fourth proportional to 386.54, 580.05 and 158.54 is: 237.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    386.54 : 580.05 = 158.54 : x
  2. Step 2: Convert to fraction form
    386.54/580.05 = 158.54/x
  3. Step 3: Cross multiply
    386.54x = 580.05 × 158.54
  4. Step 4: Simplify right side
    386.54x = 91,961.13
  5. Step 5: Solve for x
    x = 91,961.13/386.54
  6. Step 6: Final answer
    x = 237.91

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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.