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Finding the Fourth Proportional to 4,891.28, 7,332.28 and 1,812.56

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Solution

The fourth proportional to 4,891.28, 7,332.28 and 1,812.56 is: 2,717.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,891.28 : 7,332.28 = 1,812.56 : x
  2. Step 2: Convert to fraction form
    4,891.28/7,332.28 = 1,812.56/x
  3. Step 3: Cross multiply
    4,891.28x = 7,332.28 × 1,812.56
  4. Step 4: Simplify right side
    4,891.28x = 13,290,197.44
  5. Step 5: Solve for x
    x = 13,290,197.44/4,891.28
  6. Step 6: Final answer
    x = 2,717.12

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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.