Home / 1,429.07-2,138.85-1,257.80

Finding the Fourth Proportional to 1,429.07, 2,138.85 and 1,257.80

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Solution

The fourth proportional to 1,429.07, 2,138.85 and 1,257.80 is: 1,882.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,429.07 : 2,138.85 = 1,257.80 : x
  2. Step 2: Convert to fraction form
    1,429.07/2,138.85 = 1,257.80/x
  3. Step 3: Cross multiply
    1,429.07x = 2,138.85 × 1,257.80
  4. Step 4: Simplify right side
    1,429.07x = 2,690,234.84
  5. Step 5: Solve for x
    x = 2,690,234.84/1,429.07
  6. Step 6: Final answer
    x = 1,882.51

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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.