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Finding the Fourth Proportional to 494.66, 742.11 and 289.40

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Solution

The fourth proportional to 494.66, 742.11 and 289.40 is: 434.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    494.66 : 742.11 = 289.40 : x
  2. Step 2: Convert to fraction form
    494.66/742.11 = 289.40/x
  3. Step 3: Cross multiply
    494.66x = 742.11 × 289.40
  4. Step 4: Simplify right side
    494.66x = 214,761.48
  5. Step 5: Solve for x
    x = 214,761.48/494.66
  6. Step 6: Final answer
    x = 434.16

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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.