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Finding the Fourth Proportional to 585.43, 878.45 and 261.02

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Solution

The fourth proportional to 585.43, 878.45 and 261.02 is: 391.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    585.43 : 878.45 = 261.02 : x
  2. Step 2: Convert to fraction form
    585.43/878.45 = 261.02/x
  3. Step 3: Cross multiply
    585.43x = 878.45 × 261.02
  4. Step 4: Simplify right side
    585.43x = 229,293.91
  5. Step 5: Solve for x
    x = 229,293.91/585.43
  6. Step 6: Final answer
    x = 391.67

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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.