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Finding the Fourth Proportional to 494.64, 741.95 and 147.98

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Solution

The fourth proportional to 494.64, 741.95 and 147.98 is: 221.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    494.64 : 741.95 = 147.98 : x
  2. Step 2: Convert to fraction form
    494.64/741.95 = 147.98/x
  3. Step 3: Cross multiply
    494.64x = 741.95 × 147.98
  4. Step 4: Simplify right side
    494.64x = 109,790.14
  5. Step 5: Solve for x
    x = 109,790.14/494.64
  6. Step 6: Final answer
    x = 221.96

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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.