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Finding the Fourth Proportional to 558.95, 838.38 and 174.20

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Solution

The fourth proportional to 558.95, 838.38 and 174.20 is: 261.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    558.95 : 838.38 = 174.20 : x
  2. Step 2: Convert to fraction form
    558.95/838.38 = 174.20/x
  3. Step 3: Cross multiply
    558.95x = 838.38 × 174.20
  4. Step 4: Simplify right side
    558.95x = 146,042.26
  5. Step 5: Solve for x
    x = 146,042.26/558.95
  6. Step 6: Final answer
    x = 261.28

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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.