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Finding the Fourth Proportional to 585.87, 878.57 and 403.31

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Solution

The fourth proportional to 585.87, 878.57 and 403.31 is: 604.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    585.87 : 878.57 = 403.31 : x
  2. Step 2: Convert to fraction form
    585.87/878.57 = 403.31/x
  3. Step 3: Cross multiply
    585.87x = 878.57 × 403.31
  4. Step 4: Simplify right side
    585.87x = 354,329.66
  5. Step 5: Solve for x
    x = 354,329.66/585.87
  6. Step 6: Final answer
    x = 604.79

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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.