Home / 1,127.80-1,691.49-306.14

Finding the Fourth Proportional to 1,127.80, 1,691.49 and 306.14

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Solution

The fourth proportional to 1,127.80, 1,691.49 and 306.14 is: 459.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,127.80 : 1,691.49 = 306.14 : x
  2. Step 2: Convert to fraction form
    1,127.80/1,691.49 = 306.14/x
  3. Step 3: Cross multiply
    1,127.80x = 1,691.49 × 306.14
  4. Step 4: Simplify right side
    1,127.80x = 517,824.29
  5. Step 5: Solve for x
    x = 517,824.29/1,127.80
  6. Step 6: Final answer
    x = 459.15

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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.