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Finding the Fourth Proportional to 5,672.20, 8,505 and 2,205.40

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Solution

The fourth proportional to 5,672.20, 8,505 and 2,205.40 is: 3,306.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,672.20 : 8,505 = 2,205.40 : x
  2. Step 2: Convert to fraction form
    5,672.20/8,505 = 2,205.40/x
  3. Step 3: Cross multiply
    5,672.20x = 8,505 × 2,205.40
  4. Step 4: Simplify right side
    5,672.20x = 18,756,927
  5. Step 5: Solve for x
    x = 18,756,927/5,672.20
  6. Step 6: Final answer
    x = 3,306.82

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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.