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Finding the Fourth Proportional to 1,654.53, 2,481.66 and 421.92

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Solution

The fourth proportional to 1,654.53, 2,481.66 and 421.92 is: 632.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,654.53 : 2,481.66 = 421.92 : x
  2. Step 2: Convert to fraction form
    1,654.53/2,481.66 = 421.92/x
  3. Step 3: Cross multiply
    1,654.53x = 2,481.66 × 421.92
  4. Step 4: Simplify right side
    1,654.53x = 1,047,061.99
  5. Step 5: Solve for x
    x = 1,047,061.99/1,654.53
  6. Step 6: Final answer
    x = 632.85

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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.