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Finding the Fourth Proportional to 2,521.18, 3,781.91 and 766.24

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Solution

The fourth proportional to 2,521.18, 3,781.91 and 766.24 is: 1,149.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,521.18 : 3,781.91 = 766.24 : x
  2. Step 2: Convert to fraction form
    2,521.18/3,781.91 = 766.24/x
  3. Step 3: Cross multiply
    2,521.18x = 3,781.91 × 766.24
  4. Step 4: Simplify right side
    2,521.18x = 2,897,843.18
  5. Step 5: Solve for x
    x = 2,897,843.18/2,521.18
  6. Step 6: Final answer
    x = 1,149.40

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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.