Home / 2,780.11-4,170.17-1,114.99

Finding the Fourth Proportional to 2,780.11, 4,170.17 and 1,114.99

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Solution

The fourth proportional to 2,780.11, 4,170.17 and 1,114.99 is: 1,672.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,780.11 : 4,170.17 = 1,114.99 : x
  2. Step 2: Convert to fraction form
    2,780.11/4,170.17 = 1,114.99/x
  3. Step 3: Cross multiply
    2,780.11x = 4,170.17 × 1,114.99
  4. Step 4: Simplify right side
    2,780.11x = 4,649,697.85
  5. Step 5: Solve for x
    x = 4,649,697.85/2,780.11
  6. Step 6: Final answer
    x = 1,672.49

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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.