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Finding the Fourth Proportional to 585.11, 877.56 and 219.80

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Solution

The fourth proportional to 585.11, 877.56 and 219.80 is: 329.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    585.11 : 877.56 = 219.80 : x
  2. Step 2: Convert to fraction form
    585.11/877.56 = 219.80/x
  3. Step 3: Cross multiply
    585.11x = 877.56 × 219.80
  4. Step 4: Simplify right side
    585.11x = 192,883.30
  5. Step 5: Solve for x
    x = 192,883.30/585.11
  6. Step 6: Final answer
    x = 329.66

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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.