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Finding the Fourth Proportional to 3,781.62, 5,672.11 and 1,316.18

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Solution

The fourth proportional to 3,781.62, 5,672.11 and 1,316.18 is: 1,974.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,781.62 : 5,672.11 = 1,316.18 : x
  2. Step 2: Convert to fraction form
    3,781.62/5,672.11 = 1,316.18/x
  3. Step 3: Cross multiply
    3,781.62x = 5,672.11 × 1,316.18
  4. Step 4: Simplify right side
    3,781.62x = 7,465,517.74
  5. Step 5: Solve for x
    x = 7,465,517.74/3,781.62
  6. Step 6: Final answer
    x = 1,974.16

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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.