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Finding the Fourth Proportional to 351.90, 527.76 and 135.36

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Solution

The fourth proportional to 351.90, 527.76 and 135.36 is: 203.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.90 : 527.76 = 135.36 : x
  2. Step 2: Convert to fraction form
    351.90/527.76 = 135.36/x
  3. Step 3: Cross multiply
    351.90x = 527.76 × 135.36
  4. Step 4: Simplify right side
    351.90x = 71,437.59
  5. Step 5: Solve for x
    x = 71,437.59/351.90
  6. Step 6: Final answer
    x = 203.01

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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.