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Finding the Fourth Proportional to 5,123.76, 7,679.88 and 2,382

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Solution

The fourth proportional to 5,123.76, 7,679.88 and 2,382 is: 3,570.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,123.76 : 7,679.88 = 2,382 : x
  2. Step 2: Convert to fraction form
    5,123.76/7,679.88 = 2,382/x
  3. Step 3: Cross multiply
    5,123.76x = 7,679.88 × 2,382
  4. Step 4: Simplify right side
    5,123.76x = 18,293,474.16
  5. Step 5: Solve for x
    x = 18,293,474.16/5,123.76
  6. Step 6: Final answer
    x = 3,570.32

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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.