Home / 2,715.20-4,073.28-767.36

Finding the Fourth Proportional to 2,715.20, 4,073.28 and 767.36

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Solution

The fourth proportional to 2,715.20, 4,073.28 and 767.36 is: 1,151.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,715.20 : 4,073.28 = 767.36 : x
  2. Step 2: Convert to fraction form
    2,715.20/4,073.28 = 767.36/x
  3. Step 3: Cross multiply
    2,715.20x = 4,073.28 × 767.36
  4. Step 4: Simplify right side
    2,715.20x = 3,125,672.14
  5. Step 5: Solve for x
    x = 3,125,672.14/2,715.20
  6. Step 6: Final answer
    x = 1,151.18

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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.