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Finding the Fourth Proportional to 450.65, 675.91 and 142.53

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Solution

The fourth proportional to 450.65, 675.91 and 142.53 is: 213.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    450.65 : 675.91 = 142.53 : x
  2. Step 2: Convert to fraction form
    450.65/675.91 = 142.53/x
  3. Step 3: Cross multiply
    450.65x = 675.91 × 142.53
  4. Step 4: Simplify right side
    450.65x = 96,337.95
  5. Step 5: Solve for x
    x = 96,337.95/450.65
  6. Step 6: Final answer
    x = 213.78

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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.