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Finding the Fourth Proportional to 351.28, 526.90 and 135

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Solution

The fourth proportional to 351.28, 526.90 and 135 is: 202.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.28 : 526.90 = 135 : x
  2. Step 2: Convert to fraction form
    351.28/526.90 = 135/x
  3. Step 3: Cross multiply
    351.28x = 526.90 × 135
  4. Step 4: Simplify right side
    351.28x = 71,131.50
  5. Step 5: Solve for x
    x = 71,131.50/351.28
  6. Step 6: Final answer
    x = 202.49

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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.