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Finding the Fourth Proportional to 3,679.47, 5,513.70 and 3,149.22

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Solution

The fourth proportional to 3,679.47, 5,513.70 and 3,149.22 is: 4,719.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,679.47 : 5,513.70 = 3,149.22 : x
  2. Step 2: Convert to fraction form
    3,679.47/5,513.70 = 3,149.22/x
  3. Step 3: Cross multiply
    3,679.47x = 5,513.70 × 3,149.22
  4. Step 4: Simplify right side
    3,679.47x = 17,363,854.31
  5. Step 5: Solve for x
    x = 17,363,854.31/3,679.47
  6. Step 6: Final answer
    x = 4,719.12

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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.