Home / 1,391.82-2,085.90-1,244.70

Finding the Fourth Proportional to 1,391.82, 2,085.90 and 1,244.70

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Solution

The fourth proportional to 1,391.82, 2,085.90 and 1,244.70 is: 1,865.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391.82 : 2,085.90 = 1,244.70 : x
  2. Step 2: Convert to fraction form
    1,391.82/2,085.90 = 1,244.70/x
  3. Step 3: Cross multiply
    1,391.82x = 2,085.90 × 1,244.70
  4. Step 4: Simplify right side
    1,391.82x = 2,596,319.73
  5. Step 5: Solve for x
    x = 2,596,319.73/1,391.82
  6. Step 6: Final answer
    x = 1,865.41

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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.