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Finding the Fourth Proportional to 2,672.45, 4,008.37 and 724.80

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Solution

The fourth proportional to 2,672.45, 4,008.37 and 724.80 is: 1,087.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,672.45 : 4,008.37 = 724.80 : x
  2. Step 2: Convert to fraction form
    2,672.45/4,008.37 = 724.80/x
  3. Step 3: Cross multiply
    2,672.45x = 4,008.37 × 724.80
  4. Step 4: Simplify right side
    2,672.45x = 2,905,264.76
  5. Step 5: Solve for x
    x = 2,905,264.76/2,672.45
  6. Step 6: Final answer
    x = 1,087.12

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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.