Home / 1,400.40-2,091.78-1,393.92

Finding the Fourth Proportional to 1,400.40, 2,091.78 and 1,393.92

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Solution

The fourth proportional to 1,400.40, 2,091.78 and 1,393.92 is: 2,082.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,400.40 : 2,091.78 = 1,393.92 : x
  2. Step 2: Convert to fraction form
    1,400.40/2,091.78 = 1,393.92/x
  3. Step 3: Cross multiply
    1,400.40x = 2,091.78 × 1,393.92
  4. Step 4: Simplify right side
    1,400.40x = 2,915,773.98
  5. Step 5: Solve for x
    x = 2,915,773.98/1,400.40
  6. Step 6: Final answer
    x = 2,082.10

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.