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Finding the Fourth Proportional to 3,174.18, 4,761.09 and 865.50

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Solution

The fourth proportional to 3,174.18, 4,761.09 and 865.50 is: 1,298.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,174.18 : 4,761.09 = 865.50 : x
  2. Step 2: Convert to fraction form
    3,174.18/4,761.09 = 865.50/x
  3. Step 3: Cross multiply
    3,174.18x = 4,761.09 × 865.50
  4. Step 4: Simplify right side
    3,174.18x = 4,120,723.40
  5. Step 5: Solve for x
    x = 4,120,723.40/3,174.18
  6. Step 6: Final answer
    x = 1,298.20

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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.