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Finding the Fourth Proportional to 494.36, 741.64 and 147.68

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Solution

The fourth proportional to 494.36, 741.64 and 147.68 is: 221.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    494.36 : 741.64 = 147.68 : x
  2. Step 2: Convert to fraction form
    494.36/741.64 = 147.68/x
  3. Step 3: Cross multiply
    494.36x = 741.64 × 147.68
  4. Step 4: Simplify right side
    494.36x = 109,525.40
  5. Step 5: Solve for x
    x = 109,525.40/494.36
  6. Step 6: Final answer
    x = 221.55

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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.