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Finding the Fourth Proportional to 587.40, 878.94 and 331.08

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Solution

The fourth proportional to 587.40, 878.94 and 331.08 is: 495.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    587.40 : 878.94 = 331.08 : x
  2. Step 2: Convert to fraction form
    587.40/878.94 = 331.08/x
  3. Step 3: Cross multiply
    587.40x = 878.94 × 331.08
  4. Step 4: Simplify right side
    587.40x = 290,999.46
  5. Step 5: Solve for x
    x = 290,999.46/587.40
  6. Step 6: Final answer
    x = 495.40

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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.