Home / 1,217.20-1,826.15-487.29

Finding the Fourth Proportional to 1,217.20, 1,826.15 and 487.29

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Solution

The fourth proportional to 1,217.20, 1,826.15 and 487.29 is: 731.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,217.20 : 1,826.15 = 487.29 : x
  2. Step 2: Convert to fraction form
    1,217.20/1,826.15 = 487.29/x
  3. Step 3: Cross multiply
    1,217.20x = 1,826.15 × 487.29
  4. Step 4: Simplify right side
    1,217.20x = 889,863.91
  5. Step 5: Solve for x
    x = 889,863.91/1,217.20
  6. Step 6: Final answer
    x = 731.07

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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.