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Finding the Fourth Proportional to 2,671.69, 4,006.90 and 724.05

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Solution

The fourth proportional to 2,671.69, 4,006.90 and 724.05 is: 1,085.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,671.69 : 4,006.90 = 724.05 : x
  2. Step 2: Convert to fraction form
    2,671.69/4,006.90 = 724.05/x
  3. Step 3: Cross multiply
    2,671.69x = 4,006.90 × 724.05
  4. Step 4: Simplify right side
    2,671.69x = 2,901,195.95
  5. Step 5: Solve for x
    x = 2,901,195.95/2,671.69
  6. Step 6: Final answer
    x = 1,085.90

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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.