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Finding the Fourth Proportional to 671.70, 925.20 and 474.88

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Solution

The fourth proportional to 671.70, 925.20 and 474.88 is: 654.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    671.70 : 925.20 = 474.88 : x
  2. Step 2: Convert to fraction form
    671.70/925.20 = 474.88/x
  3. Step 3: Cross multiply
    671.70x = 925.20 × 474.88
  4. Step 4: Simplify right side
    671.70x = 439,358.98
  5. Step 5: Solve for x
    x = 439,358.98/671.70
  6. Step 6: Final answer
    x = 654.10

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1.5x scale

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.