Home / 3,108.08-4,289.14-1,781.78

Finding the Fourth Proportional to 3,108.08, 4,289.14 and 1,781.78

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Solution

The fourth proportional to 3,108.08, 4,289.14 and 1,781.78 is: 2,458.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,108.08 : 4,289.14 = 1,781.78 : x
  2. Step 2: Convert to fraction form
    3,108.08/4,289.14 = 1,781.78/x
  3. Step 3: Cross multiply
    3,108.08x = 4,289.14 × 1,781.78
  4. Step 4: Simplify right side
    3,108.08x = 7,642,303.87
  5. Step 5: Solve for x
    x = 7,642,303.87/3,108.08
  6. Step 6: Final answer
    x = 2,458.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.