Home / 1,248.38-1,864.20-1,185.20

Finding the Fourth Proportional to 1,248.38, 1,864.20 and 1,185.20

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Solution

The fourth proportional to 1,248.38, 1,864.20 and 1,185.20 is: 1,769.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,248.38 : 1,864.20 = 1,185.20 : x
  2. Step 2: Convert to fraction form
    1,248.38/1,864.20 = 1,185.20/x
  3. Step 3: Cross multiply
    1,248.38x = 1,864.20 × 1,185.20
  4. Step 4: Simplify right side
    1,248.38x = 2,209,449.84
  5. Step 5: Solve for x
    x = 2,209,449.84/1,248.38
  6. Step 6: Final answer
    x = 1,769.85

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.