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Finding the Fourth Proportional to 585.44, 878.13 and 260.81

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Solution

The fourth proportional to 585.44, 878.13 and 260.81 is: 391.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    585.44 : 878.13 = 260.81 : x
  2. Step 2: Convert to fraction form
    585.44/878.13 = 260.81/x
  3. Step 3: Cross multiply
    585.44x = 878.13 × 260.81
  4. Step 4: Simplify right side
    585.44x = 229,025.09
  5. Step 5: Solve for x
    x = 229,025.09/585.44
  6. Step 6: Final answer
    x = 391.20

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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.