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Finding the Fourth Proportional to 1,147.32, 1,581.12 and 797.40

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Solution

The fourth proportional to 1,147.32, 1,581.12 and 797.40 is: 1,098.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,147.32 : 1,581.12 = 797.40 : x
  2. Step 2: Convert to fraction form
    1,147.32/1,581.12 = 797.40/x
  3. Step 3: Cross multiply
    1,147.32x = 1,581.12 × 797.40
  4. Step 4: Simplify right side
    1,147.32x = 1,260,785.09
  5. Step 5: Solve for x
    x = 1,260,785.09/1,147.32
  6. Step 6: Final answer
    x = 1,098.90

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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.