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Finding the Fourth Proportional to 351.05, 526.12 and 145.38

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Solution

The fourth proportional to 351.05, 526.12 and 145.38 is: 217.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.05 : 526.12 = 145.38 : x
  2. Step 2: Convert to fraction form
    351.05/526.12 = 145.38/x
  3. Step 3: Cross multiply
    351.05x = 526.12 × 145.38
  4. Step 4: Simplify right side
    351.05x = 76,487.33
  5. Step 5: Solve for x
    x = 76,487.33/351.05
  6. Step 6: Final answer
    x = 217.88

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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.