Home / 1,218.38-1,826.60-487.76

Finding the Fourth Proportional to 1,218.38, 1,826.60 and 487.76

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Solution

The fourth proportional to 1,218.38, 1,826.60 and 487.76 is: 731.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218.38 : 1,826.60 = 487.76 : x
  2. Step 2: Convert to fraction form
    1,218.38/1,826.60 = 487.76/x
  3. Step 3: Cross multiply
    1,218.38x = 1,826.60 × 487.76
  4. Step 4: Simplify right side
    1,218.38x = 890,942.42
  5. Step 5: Solve for x
    x = 890,942.42/1,218.38
  6. Step 6: Final answer
    x = 731.25

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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.