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Finding the Fourth Proportional to 3,191.76, 4,404.12 and 1,932.60

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Solution

The fourth proportional to 3,191.76, 4,404.12 and 1,932.60 is: 2,666.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,191.76 : 4,404.12 = 1,932.60 : x
  2. Step 2: Convert to fraction form
    3,191.76/4,404.12 = 1,932.60/x
  3. Step 3: Cross multiply
    3,191.76x = 4,404.12 × 1,932.60
  4. Step 4: Simplify right side
    3,191.76x = 8,511,402.31
  5. Step 5: Solve for x
    x = 8,511,402.31/3,191.76
  6. Step 6: Final answer
    x = 2,666.68

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.