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Finding the Fourth Proportional to 552.62, 762.68 and 328.70

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Solution

The fourth proportional to 552.62, 762.68 and 328.70 is: 453.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    552.62 : 762.68 = 328.70 : x
  2. Step 2: Convert to fraction form
    552.62/762.68 = 328.70/x
  3. Step 3: Cross multiply
    552.62x = 762.68 × 328.70
  4. Step 4: Simplify right side
    552.62x = 250,687.46
  5. Step 5: Solve for x
    x = 250,687.46/552.62
  6. Step 6: Final answer
    x = 453.64

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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.