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Finding the Fourth Proportional to 5,286.52, 7,931.02 and 2,820.04

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Solution

The fourth proportional to 5,286.52, 7,931.02 and 2,820.04 is: 4,230.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,286.52 : 7,931.02 = 2,820.04 : x
  2. Step 2: Convert to fraction form
    5,286.52/7,931.02 = 2,820.04/x
  3. Step 3: Cross multiply
    5,286.52x = 7,931.02 × 2,820.04
  4. Step 4: Simplify right side
    5,286.52x = 22,365,793.64
  5. Step 5: Solve for x
    x = 22,365,793.64/5,286.52
  6. Step 6: Final answer
    x = 4,230.72

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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.