Home / 1,258.20-1,736.46-1,217.88

Finding the Fourth Proportional to 1,258.20, 1,736.46 and 1,217.88

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Solution

The fourth proportional to 1,258.20, 1,736.46 and 1,217.88 is: 1,680.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,258.20 : 1,736.46 = 1,217.88 : x
  2. Step 2: Convert to fraction form
    1,258.20/1,736.46 = 1,217.88/x
  3. Step 3: Cross multiply
    1,258.20x = 1,736.46 × 1,217.88
  4. Step 4: Simplify right side
    1,258.20x = 2,114,799.90
  5. Step 5: Solve for x
    x = 2,114,799.90/1,258.20
  6. Step 6: Final answer
    x = 1,680.81

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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.