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Finding the Fourth Proportional to 590.20, 885.40 and 225

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Solution

The fourth proportional to 590.20, 885.40 and 225 is: 337.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    590.20 : 885.40 = 225 : x
  2. Step 2: Convert to fraction form
    590.20/885.40 = 225/x
  3. Step 3: Cross multiply
    590.20x = 885.40 × 225
  4. Step 4: Simplify right side
    590.20x = 199,215
  5. Step 5: Solve for x
    x = 199,215/590.20
  6. Step 6: Final answer
    x = 337.54

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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.