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Finding the Fourth Proportional to 2,231.96, 3,347.96 and 771.12

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Solution

The fourth proportional to 2,231.96, 3,347.96 and 771.12 is: 1,156.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,231.96 : 3,347.96 = 771.12 : x
  2. Step 2: Convert to fraction form
    2,231.96/3,347.96 = 771.12/x
  3. Step 3: Cross multiply
    2,231.96x = 3,347.96 × 771.12
  4. Step 4: Simplify right side
    2,231.96x = 2,581,675.06
  5. Step 5: Solve for x
    x = 2,581,675.06/2,231.96
  6. Step 6: Final answer
    x = 1,156.69

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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.