Home / 3,178.16-4,385.45-1,761.78

Finding the Fourth Proportional to 3,178.16, 4,385.45 and 1,761.78

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Solution

The fourth proportional to 3,178.16, 4,385.45 and 1,761.78 is: 2,431.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,178.16 : 4,385.45 = 1,761.78 : x
  2. Step 2: Convert to fraction form
    3,178.16/4,385.45 = 1,761.78/x
  3. Step 3: Cross multiply
    3,178.16x = 4,385.45 × 1,761.78
  4. Step 4: Simplify right side
    3,178.16x = 7,726,172.85
  5. Step 5: Solve for x
    x = 7,726,172.85/3,178.16
  6. Step 6: Final answer
    x = 2,431.02

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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.