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Finding the Fourth Proportional to 881.86, 1,217.20 and 550.10

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Solution

The fourth proportional to 881.86, 1,217.20 and 550.10 is: 759.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.86 : 1,217.20 = 550.10 : x
  2. Step 2: Convert to fraction form
    881.86/1,217.20 = 550.10/x
  3. Step 3: Cross multiply
    881.86x = 1,217.20 × 550.10
  4. Step 4: Simplify right side
    881.86x = 669,581.72
  5. Step 5: Solve for x
    x = 669,581.72/881.86
  6. Step 6: Final answer
    x = 759.28

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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.