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Finding the Fourth Proportional to 585.90, 879.18 and 311.97

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Solution

The fourth proportional to 585.90, 879.18 and 311.97 is: 468.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    585.90 : 879.18 = 311.97 : x
  2. Step 2: Convert to fraction form
    585.90/879.18 = 311.97/x
  3. Step 3: Cross multiply
    585.90x = 879.18 × 311.97
  4. Step 4: Simplify right side
    585.90x = 274,277.78
  5. Step 5: Solve for x
    x = 274,277.78/585.90
  6. Step 6: Final answer
    x = 468.13

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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.