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Finding the Fourth Proportional to 351.20, 526.79 and 145.61

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Solution

The fourth proportional to 351.20, 526.79 and 145.61 is: 218.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.20 : 526.79 = 145.61 : x
  2. Step 2: Convert to fraction form
    351.20/526.79 = 145.61/x
  3. Step 3: Cross multiply
    351.20x = 526.79 × 145.61
  4. Step 4: Simplify right side
    351.20x = 76,705.89
  5. Step 5: Solve for x
    x = 76,705.89/351.20
  6. Step 6: Final answer
    x = 218.41

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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.