Home / 1,631.40-2,251.13-968.12

Finding the Fourth Proportional to 1,631.40, 2,251.13 and 968.12

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Solution

The fourth proportional to 1,631.40, 2,251.13 and 968.12 is: 1,335.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,631.40 : 2,251.13 = 968.12 : x
  2. Step 2: Convert to fraction form
    1,631.40/2,251.13 = 968.12/x
  3. Step 3: Cross multiply
    1,631.40x = 2,251.13 × 968.12
  4. Step 4: Simplify right side
    1,631.40x = 2,179,347.88
  5. Step 5: Solve for x
    x = 2,179,347.88/1,631.40
  6. Step 6: Final answer
    x = 1,335.88

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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.