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Finding the Fourth Proportional to 5,275.27, 7,913.76 and 1,988.61

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Solution

The fourth proportional to 5,275.27, 7,913.76 and 1,988.61 is: 2,983.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,275.27 : 7,913.76 = 1,988.61 : x
  2. Step 2: Convert to fraction form
    5,275.27/7,913.76 = 1,988.61/x
  3. Step 3: Cross multiply
    5,275.27x = 7,913.76 × 1,988.61
  4. Step 4: Simplify right side
    5,275.27x = 15,737,382.27
  5. Step 5: Solve for x
    x = 15,737,382.27/5,275.27
  6. Step 6: Final answer
    x = 2,983.24

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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.