Home / 3,240.13-4,859.15-1,390.75

Finding the Fourth Proportional to 3,240.13, 4,859.15 and 1,390.75

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Solution

The fourth proportional to 3,240.13, 4,859.15 and 1,390.75 is: 2,085.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,240.13 : 4,859.15 = 1,390.75 : x
  2. Step 2: Convert to fraction form
    3,240.13/4,859.15 = 1,390.75/x
  3. Step 3: Cross multiply
    3,240.13x = 4,859.15 × 1,390.75
  4. Step 4: Simplify right side
    3,240.13x = 6,757,862.86
  5. Step 5: Solve for x
    x = 6,757,862.86/3,240.13
  6. Step 6: Final answer
    x = 2,085.68

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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.