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Finding the Fourth Proportional to 494.37, 741.56 and 129.16

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Solution

The fourth proportional to 494.37, 741.56 and 129.16 is: 193.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    494.37 : 741.56 = 129.16 : x
  2. Step 2: Convert to fraction form
    494.37/741.56 = 129.16/x
  3. Step 3: Cross multiply
    494.37x = 741.56 × 129.16
  4. Step 4: Simplify right side
    494.37x = 95,779.89
  5. Step 5: Solve for x
    x = 95,779.89/494.37
  6. Step 6: Final answer
    x = 193.74

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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.