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Finding the Fourth Proportional to 587.19, 878.49 and 440.85

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Solution

The fourth proportional to 587.19, 878.49 and 440.85 is: 659.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    587.19 : 878.49 = 440.85 : x
  2. Step 2: Convert to fraction form
    587.19/878.49 = 440.85/x
  3. Step 3: Cross multiply
    587.19x = 878.49 × 440.85
  4. Step 4: Simplify right side
    587.19x = 387,282.32
  5. Step 5: Solve for x
    x = 387,282.32/587.19
  6. Step 6: Final answer
    x = 659.55

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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.