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Finding the Fourth Proportional to 2,708.64, 4,062.93 and 656.64

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Solution

The fourth proportional to 2,708.64, 4,062.93 and 656.64 is: 984.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,708.64 : 4,062.93 = 656.64 : x
  2. Step 2: Convert to fraction form
    2,708.64/4,062.93 = 656.64/x
  3. Step 3: Cross multiply
    2,708.64x = 4,062.93 × 656.64
  4. Step 4: Simplify right side
    2,708.64x = 2,667,882.36
  5. Step 5: Solve for x
    x = 2,667,882.36/2,708.64
  6. Step 6: Final answer
    x = 984.95

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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.