Home / 3,434.28-5,151.78-1,125.78

Finding the Fourth Proportional to 3,434.28, 5,151.78 and 1,125.78

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Solution

The fourth proportional to 3,434.28, 5,151.78 and 1,125.78 is: 1,688.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,434.28 : 5,151.78 = 1,125.78 : x
  2. Step 2: Convert to fraction form
    3,434.28/5,151.78 = 1,125.78/x
  3. Step 3: Cross multiply
    3,434.28x = 5,151.78 × 1,125.78
  4. Step 4: Simplify right side
    3,434.28x = 5,799,770.89
  5. Step 5: Solve for x
    x = 5,799,770.89/3,434.28
  6. Step 6: Final answer
    x = 1,688.79

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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.