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Finding the Fourth Proportional to 487.22, 730.82 and 145.22

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Solution

The fourth proportional to 487.22, 730.82 and 145.22 is: 217.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.22 : 730.82 = 145.22 : x
  2. Step 2: Convert to fraction form
    487.22/730.82 = 145.22/x
  3. Step 3: Cross multiply
    487.22x = 730.82 × 145.22
  4. Step 4: Simplify right side
    487.22x = 106,129.68
  5. Step 5: Solve for x
    x = 106,129.68/487.22
  6. Step 6: Final answer
    x = 217.83

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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.