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Finding the Fourth Proportional to 5,191.88, 7,787.88 and 1,729.13

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Solution

The fourth proportional to 5,191.88, 7,787.88 and 1,729.13 is: 2,593.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,191.88 : 7,787.88 = 1,729.13 : x
  2. Step 2: Convert to fraction form
    5,191.88/7,787.88 = 1,729.13/x
  3. Step 3: Cross multiply
    5,191.88x = 7,787.88 × 1,729.13
  4. Step 4: Simplify right side
    5,191.88x = 13,466,218.01
  5. Step 5: Solve for x
    x = 13,466,218.01/5,191.88
  6. Step 6: Final answer
    x = 2,593.71

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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.