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Finding the Fourth Proportional to 1,727.32, 2,588.80 and 861.88

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Solution

The fourth proportional to 1,727.32, 2,588.80 and 861.88 is: 1,291.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,727.32 : 2,588.80 = 861.88 : x
  2. Step 2: Convert to fraction form
    1,727.32/2,588.80 = 861.88/x
  3. Step 3: Cross multiply
    1,727.32x = 2,588.80 × 861.88
  4. Step 4: Simplify right side
    1,727.32x = 2,231,234.94
  5. Step 5: Solve for x
    x = 2,231,234.94/1,727.32
  6. Step 6: Final answer
    x = 1,291.73

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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.