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Finding the Fourth Proportional to 3,872.19, 5,808.19 and 1,275.13

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Solution

The fourth proportional to 3,872.19, 5,808.19 and 1,275.13 is: 1,912.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,872.19 : 5,808.19 = 1,275.13 : x
  2. Step 2: Convert to fraction form
    3,872.19/5,808.19 = 1,275.13/x
  3. Step 3: Cross multiply
    3,872.19x = 5,808.19 × 1,275.13
  4. Step 4: Simplify right side
    3,872.19x = 7,406,197.31
  5. Step 5: Solve for x
    x = 7,406,197.31/3,872.19
  6. Step 6: Final answer
    x = 1,912.66

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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.