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Finding the Fourth Proportional to 585.83, 878.72 and 261.11

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Solution

The fourth proportional to 585.83, 878.72 and 261.11 is: 391.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    585.83 : 878.72 = 261.11 : x
  2. Step 2: Convert to fraction form
    585.83/878.72 = 261.11/x
  3. Step 3: Cross multiply
    585.83x = 878.72 × 261.11
  4. Step 4: Simplify right side
    585.83x = 229,436.88
  5. Step 5: Solve for x
    x = 229,436.88/585.83
  6. Step 6: Final answer
    x = 391.65

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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.