Home / 1,385.55-2,080.28-1,110.78

Finding the Fourth Proportional to 1,385.55, 2,080.28 and 1,110.78

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Solution

The fourth proportional to 1,385.55, 2,080.28 and 1,110.78 is: 1,667.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385.55 : 2,080.28 = 1,110.78 : x
  2. Step 2: Convert to fraction form
    1,385.55/2,080.28 = 1,110.78/x
  3. Step 3: Cross multiply
    1,385.55x = 2,080.28 × 1,110.78
  4. Step 4: Simplify right side
    1,385.55x = 2,310,727.86
  5. Step 5: Solve for x
    x = 2,310,727.86/1,385.55
  6. Step 6: Final answer
    x = 1,667.73

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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.