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Finding the Fourth Proportional to 4,979.64, 7,469.46 and 4,155.88

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Solution

The fourth proportional to 4,979.64, 7,469.46 and 4,155.88 is: 6,233.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,979.64 : 7,469.46 = 4,155.88 : x
  2. Step 2: Convert to fraction form
    4,979.64/7,469.46 = 4,155.88/x
  3. Step 3: Cross multiply
    4,979.64x = 7,469.46 × 4,155.88
  4. Step 4: Simplify right side
    4,979.64x = 31,042,179.42
  5. Step 5: Solve for x
    x = 31,042,179.42/4,979.64
  6. Step 6: Final answer
    x = 6,233.82

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1.5x scale

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.