Home / 1,399.75-2,085.64-1,315.92

Finding the Fourth Proportional to 1,399.75, 2,085.64 and 1,315.92

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Solution

The fourth proportional to 1,399.75, 2,085.64 and 1,315.92 is: 1,960.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,399.75 : 2,085.64 = 1,315.92 : x
  2. Step 2: Convert to fraction form
    1,399.75/2,085.64 = 1,315.92/x
  3. Step 3: Cross multiply
    1,399.75x = 2,085.64 × 1,315.92
  4. Step 4: Simplify right side
    1,399.75x = 2,744,535.39
  5. Step 5: Solve for x
    x = 2,744,535.39/1,399.75
  6. Step 6: Final answer
    x = 1,960.73

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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.