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Finding the Fourth Proportional to 2,169.78, 3,253.96 and 708.58

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Solution

The fourth proportional to 2,169.78, 3,253.96 and 708.58 is: 1,062.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,169.78 : 3,253.96 = 708.58 : x
  2. Step 2: Convert to fraction form
    2,169.78/3,253.96 = 708.58/x
  3. Step 3: Cross multiply
    2,169.78x = 3,253.96 × 708.58
  4. Step 4: Simplify right side
    2,169.78x = 2,305,690.98
  5. Step 5: Solve for x
    x = 2,305,690.98/2,169.78
  6. Step 6: Final answer
    x = 1,062.64

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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.