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Finding the Fourth Proportional to 2,633.18, 3,949.70 and 878.20

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Solution

The fourth proportional to 2,633.18, 3,949.70 and 878.20 is: 1,317.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,633.18 : 3,949.70 = 878.20 : x
  2. Step 2: Convert to fraction form
    2,633.18/3,949.70 = 878.20/x
  3. Step 3: Cross multiply
    2,633.18x = 3,949.70 × 878.20
  4. Step 4: Simplify right side
    2,633.18x = 3,468,612.27
  5. Step 5: Solve for x
    x = 3,468,612.27/2,633.18
  6. Step 6: Final answer
    x = 1,317.27

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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.