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Finding the Fourth Proportional to 2,520.97, 3,781.08 and 672.20

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Solution

The fourth proportional to 2,520.97, 3,781.08 and 672.20 is: 1,008.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,520.97 : 3,781.08 = 672.20 : x
  2. Step 2: Convert to fraction form
    2,520.97/3,781.08 = 672.20/x
  3. Step 3: Cross multiply
    2,520.97x = 3,781.08 × 672.20
  4. Step 4: Simplify right side
    2,520.97x = 2,541,637.25
  5. Step 5: Solve for x
    x = 2,541,637.25/2,520.97
  6. Step 6: Final answer
    x = 1,008.20

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1.5x scale

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.