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Finding the Fourth Proportional to 3,169.68, 4,754.16 and 861.12

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Solution

The fourth proportional to 3,169.68, 4,754.16 and 861.12 is: 1,291.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,169.68 : 4,754.16 = 861.12 : x
  2. Step 2: Convert to fraction form
    3,169.68/4,754.16 = 861.12/x
  3. Step 3: Cross multiply
    3,169.68x = 4,754.16 × 861.12
  4. Step 4: Simplify right side
    3,169.68x = 4,093,902.26
  5. Step 5: Solve for x
    x = 4,093,902.26/3,169.68
  6. Step 6: Final answer
    x = 1,291.58

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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.