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Finding the Fourth Proportional to 2,480.45, 3,720.68 and 749.07

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Solution

The fourth proportional to 2,480.45, 3,720.68 and 749.07 is: 1,123.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,480.45 : 3,720.68 = 749.07 : x
  2. Step 2: Convert to fraction form
    2,480.45/3,720.68 = 749.07/x
  3. Step 3: Cross multiply
    2,480.45x = 3,720.68 × 749.07
  4. Step 4: Simplify right side
    2,480.45x = 2,787,046.02
  5. Step 5: Solve for x
    x = 2,787,046.02/2,480.45
  6. Step 6: Final answer
    x = 1,123.61

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1.5x scale

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.