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Finding the Fourth Proportional to 2,691.40, 3,713.98 and 1,512.25

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Solution

The fourth proportional to 2,691.40, 3,713.98 and 1,512.25 is: 2,086.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,691.40 : 3,713.98 = 1,512.25 : x
  2. Step 2: Convert to fraction form
    2,691.40/3,713.98 = 1,512.25/x
  3. Step 3: Cross multiply
    2,691.40x = 3,713.98 × 1,512.25
  4. Step 4: Simplify right side
    2,691.40x = 5,616,466.26
  5. Step 5: Solve for x
    x = 5,616,466.26/2,691.40
  6. Step 6: Final answer
    x = 2,086.82

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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.