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Finding the Fourth Proportional to 351.06, 526.80 and 145.73

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Solution

The fourth proportional to 351.06, 526.80 and 145.73 is: 218.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.06 : 526.80 = 145.73 : x
  2. Step 2: Convert to fraction form
    351.06/526.80 = 145.73/x
  3. Step 3: Cross multiply
    351.06x = 526.80 × 145.73
  4. Step 4: Simplify right side
    351.06x = 76,770.56
  5. Step 5: Solve for x
    x = 76,770.56/351.06
  6. Step 6: Final answer
    x = 218.68

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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.