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Finding the Fourth Proportional to 1,432.76, 2,148.68 and 458.63

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Solution

The fourth proportional to 1,432.76, 2,148.68 and 458.63 is: 687.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,432.76 : 2,148.68 = 458.63 : x
  2. Step 2: Convert to fraction form
    1,432.76/2,148.68 = 458.63/x
  3. Step 3: Cross multiply
    1,432.76x = 2,148.68 × 458.63
  4. Step 4: Simplify right side
    1,432.76x = 985,436.07
  5. Step 5: Solve for x
    x = 985,436.07/1,432.76
  6. Step 6: Final answer
    x = 687.79

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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.