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Finding the Fourth Proportional to 5,191.38, 7,787.13 and 1,728.63

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Solution

The fourth proportional to 5,191.38, 7,787.13 and 1,728.63 is: 2,592.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,191.38 : 7,787.13 = 1,728.63 : x
  2. Step 2: Convert to fraction form
    5,191.38/7,787.13 = 1,728.63/x
  3. Step 3: Cross multiply
    5,191.38x = 7,787.13 × 1,728.63
  4. Step 4: Simplify right side
    5,191.38x = 13,461,066.53
  5. Step 5: Solve for x
    x = 13,461,066.53/5,191.38
  6. Step 6: Final answer
    x = 2,592.96

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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.