Home / 3,128.64-4,691.13-1,180.98

Finding the Fourth Proportional to 3,128.64, 4,691.13 and 1,180.98

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Solution

The fourth proportional to 3,128.64, 4,691.13 and 1,180.98 is: 1,770.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.64 : 4,691.13 = 1,180.98 : x
  2. Step 2: Convert to fraction form
    3,128.64/4,691.13 = 1,180.98/x
  3. Step 3: Cross multiply
    3,128.64x = 4,691.13 × 1,180.98
  4. Step 4: Simplify right side
    3,128.64x = 5,540,130.71
  5. Step 5: Solve for x
    x = 5,540,130.71/3,128.64
  6. Step 6: Final answer
    x = 1,770.78

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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.