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Finding the Fourth Proportional to 4,979.76, 7,464.56 and 1,691.92

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Solution

The fourth proportional to 4,979.76, 7,464.56 and 1,691.92 is: 2,536.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,979.76 : 7,464.56 = 1,691.92 : x
  2. Step 2: Convert to fraction form
    4,979.76/7,464.56 = 1,691.92/x
  3. Step 3: Cross multiply
    4,979.76x = 7,464.56 × 1,691.92
  4. Step 4: Simplify right side
    4,979.76x = 12,629,438.36
  5. Step 5: Solve for x
    x = 12,629,438.36/4,979.76
  6. Step 6: Final answer
    x = 2,536.15

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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.