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Finding the Fourth Proportional to 1,432.79, 2,149.46 and 458.63

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Solution

The fourth proportional to 1,432.79, 2,149.46 and 458.63 is: 688.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,432.79 : 2,149.46 = 458.63 : x
  2. Step 2: Convert to fraction form
    1,432.79/2,149.46 = 458.63/x
  3. Step 3: Cross multiply
    1,432.79x = 2,149.46 × 458.63
  4. Step 4: Simplify right side
    1,432.79x = 985,806.84
  5. Step 5: Solve for x
    x = 985,806.84/1,432.79
  6. Step 6: Final answer
    x = 688.03

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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.