Home / 3,128.85-4,691.81-1,153.98

Finding the Fourth Proportional to 3,128.85, 4,691.81 and 1,153.98

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Solution

The fourth proportional to 3,128.85, 4,691.81 and 1,153.98 is: 1,730.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,128.85 : 4,691.81 = 1,153.98 : x
  2. Step 2: Convert to fraction form
    3,128.85/4,691.81 = 1,153.98/x
  3. Step 3: Cross multiply
    3,128.85x = 4,691.81 × 1,153.98
  4. Step 4: Simplify right side
    3,128.85x = 5,414,249.13
  5. Step 5: Solve for x
    x = 5,414,249.13/3,128.85
  6. Step 6: Final answer
    x = 1,730.43

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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.