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Finding the Fourth Proportional to 2,188.66, 3,281.16 and 871.59

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Solution

The fourth proportional to 2,188.66, 3,281.16 and 871.59 is: 1,306.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,188.66 : 3,281.16 = 871.59 : x
  2. Step 2: Convert to fraction form
    2,188.66/3,281.16 = 871.59/x
  3. Step 3: Cross multiply
    2,188.66x = 3,281.16 × 871.59
  4. Step 4: Simplify right side
    2,188.66x = 2,859,826.24
  5. Step 5: Solve for x
    x = 2,859,826.24/2,188.66
  6. Step 6: Final answer
    x = 1,306.66

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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.