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Finding the Fourth Proportional to 494.48, 741.61 and 147.76

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Solution

The fourth proportional to 494.48, 741.61 and 147.76 is: 221.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    494.48 : 741.61 = 147.76 : x
  2. Step 2: Convert to fraction form
    494.48/741.61 = 147.76/x
  3. Step 3: Cross multiply
    494.48x = 741.61 × 147.76
  4. Step 4: Simplify right side
    494.48x = 109,578.07
  5. Step 5: Solve for x
    x = 109,578.07/494.48
  6. Step 6: Final answer
    x = 221.60

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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.