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Finding the Fourth Proportional to 2,209.95, 3,315.33 and 748.98

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Solution

The fourth proportional to 2,209.95, 3,315.33 and 748.98 is: 1,123.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,209.95 : 3,315.33 = 748.98 : x
  2. Step 2: Convert to fraction form
    2,209.95/3,315.33 = 748.98/x
  3. Step 3: Cross multiply
    2,209.95x = 3,315.33 × 748.98
  4. Step 4: Simplify right side
    2,209.95x = 2,483,115.86
  5. Step 5: Solve for x
    x = 2,483,115.86/2,209.95
  6. Step 6: Final answer
    x = 1,123.61

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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.