Home / 2,143.50-2,958.62-1,247.41

Finding the Fourth Proportional to 2,143.50, 2,958.62 and 1,247.41

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Solution

The fourth proportional to 2,143.50, 2,958.62 and 1,247.41 is: 1,721.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,143.50 : 2,958.62 = 1,247.41 : x
  2. Step 2: Convert to fraction form
    2,143.50/2,958.62 = 1,247.41/x
  3. Step 3: Cross multiply
    2,143.50x = 2,958.62 × 1,247.41
  4. Step 4: Simplify right side
    2,143.50x = 3,690,618.99
  5. Step 5: Solve for x
    x = 3,690,618.99/2,143.50
  6. Step 6: Final answer
    x = 1,721.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.