Home / 1,217.75-1,826.96-487.85

Finding the Fourth Proportional to 1,217.75, 1,826.96 and 487.85

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Solution

The fourth proportional to 1,217.75, 1,826.96 and 487.85 is: 731.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,217.75 : 1,826.96 = 487.85 : x
  2. Step 2: Convert to fraction form
    1,217.75/1,826.96 = 487.85/x
  3. Step 3: Cross multiply
    1,217.75x = 1,826.96 × 487.85
  4. Step 4: Simplify right side
    1,217.75x = 891,270.86
  5. Step 5: Solve for x
    x = 891,270.86/1,217.75
  6. Step 6: Final answer
    x = 731.90

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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.