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Finding the Fourth Proportional to 880.38, 1,321.77 and 605.79

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Solution

The fourth proportional to 880.38, 1,321.77 and 605.79 is: 909.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.38 : 1,321.77 = 605.79 : x
  2. Step 2: Convert to fraction form
    880.38/1,321.77 = 605.79/x
  3. Step 3: Cross multiply
    880.38x = 1,321.77 × 605.79
  4. Step 4: Simplify right side
    880.38x = 800,715.05
  5. Step 5: Solve for x
    x = 800,715.05/880.38
  6. Step 6: Final answer
    x = 909.51

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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.