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Finding the Fourth Proportional to 5,275.68, 7,913.52 and 1,380.42

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Solution

The fourth proportional to 5,275.68, 7,913.52 and 1,380.42 is: 2,070.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,275.68 : 7,913.52 = 1,380.42 : x
  2. Step 2: Convert to fraction form
    5,275.68/7,913.52 = 1,380.42/x
  3. Step 3: Cross multiply
    5,275.68x = 7,913.52 × 1,380.42
  4. Step 4: Simplify right side
    5,275.68x = 10,923,981.28
  5. Step 5: Solve for x
    x = 10,923,981.28/5,275.68
  6. Step 6: Final answer
    x = 2,070.63

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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.