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Finding the Fourth Proportional to 753.25, 1,039.49 and 458.55

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Solution

The fourth proportional to 753.25, 1,039.49 and 458.55 is: 632.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    753.25 : 1,039.49 = 458.55 : x
  2. Step 2: Convert to fraction form
    753.25/1,039.49 = 458.55/x
  3. Step 3: Cross multiply
    753.25x = 1,039.49 × 458.55
  4. Step 4: Simplify right side
    753.25x = 476,658.14
  5. Step 5: Solve for x
    x = 476,658.14/753.25
  6. Step 6: Final answer
    x = 632.80

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.