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Finding the Fourth Proportional to 631.60, 948.08 and 457.52

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Solution

The fourth proportional to 631.60, 948.08 and 457.52 is: 686.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    631.60 : 948.08 = 457.52 : x
  2. Step 2: Convert to fraction form
    631.60/948.08 = 457.52/x
  3. Step 3: Cross multiply
    631.60x = 948.08 × 457.52
  4. Step 4: Simplify right side
    631.60x = 433,765.56
  5. Step 5: Solve for x
    x = 433,765.56/631.60
  6. Step 6: Final answer
    x = 686.77

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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.