Home / 2,209.85-3,315.40-749.12

Finding the Fourth Proportional to 2,209.85, 3,315.40 and 749.12

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Solution

The fourth proportional to 2,209.85, 3,315.40 and 749.12 is: 1,123.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,209.85 : 3,315.40 = 749.12 : x
  2. Step 2: Convert to fraction form
    2,209.85/3,315.40 = 749.12/x
  3. Step 3: Cross multiply
    2,209.85x = 3,315.40 × 749.12
  4. Step 4: Simplify right side
    2,209.85x = 2,483,614.00
  5. Step 5: Solve for x
    x = 2,483,614.00/2,209.85
  6. Step 6: Final answer
    x = 1,123.88

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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.