Home / 2,118.32-3,177.65-731.67

Finding the Fourth Proportional to 2,118.32, 3,177.65 and 731.67

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Solution

The fourth proportional to 2,118.32, 3,177.65 and 731.67 is: 1,097.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,118.32 : 3,177.65 = 731.67 : x
  2. Step 2: Convert to fraction form
    2,118.32/3,177.65 = 731.67/x
  3. Step 3: Cross multiply
    2,118.32x = 3,177.65 × 731.67
  4. Step 4: Simplify right side
    2,118.32x = 2,324,991.18
  5. Step 5: Solve for x
    x = 2,324,991.18/2,118.32
  6. Step 6: Final answer
    x = 1,097.56

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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.