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Finding the Fourth Proportional to 585.56, 878.40 and 260.84

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Solution

The fourth proportional to 585.56, 878.40 and 260.84 is: 391.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    585.56 : 878.40 = 260.84 : x
  2. Step 2: Convert to fraction form
    585.56/878.40 = 260.84/x
  3. Step 3: Cross multiply
    585.56x = 878.40 × 260.84
  4. Step 4: Simplify right side
    585.56x = 229,121.86
  5. Step 5: Solve for x
    x = 229,121.86/585.56
  6. Step 6: Final answer
    x = 391.29

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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.