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Finding the Fourth Proportional to 558.38, 837.61 and 147.51

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Solution

The fourth proportional to 558.38, 837.61 and 147.51 is: 221.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.38 : 837.61 = 147.51 : x
  2. Step 2: Convert to fraction form
    558.38/837.61 = 147.51/x
  3. Step 3: Cross multiply
    558.38x = 837.61 × 147.51
  4. Step 4: Simplify right side
    558.38x = 123,555.85
  5. Step 5: Solve for x
    x = 123,555.85/558.38
  6. Step 6: Final answer
    x = 221.28

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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.