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Finding the Fourth Proportional to 351.91, 527.87 and 135.45

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Solution

The fourth proportional to 351.91, 527.87 and 135.45 is: 203.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.91 : 527.87 = 135.45 : x
  2. Step 2: Convert to fraction form
    351.91/527.87 = 135.45/x
  3. Step 3: Cross multiply
    351.91x = 527.87 × 135.45
  4. Step 4: Simplify right side
    351.91x = 71,499.99
  5. Step 5: Solve for x
    x = 71,499.99/351.91
  6. Step 6: Final answer
    x = 203.18

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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.