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Finding the Fourth Proportional to 486.83, 730.37 and 212.97

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Solution

The fourth proportional to 486.83, 730.37 and 212.97 is: 319.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    486.83 : 730.37 = 212.97 : x
  2. Step 2: Convert to fraction form
    486.83/730.37 = 212.97/x
  3. Step 3: Cross multiply
    486.83x = 730.37 × 212.97
  4. Step 4: Simplify right side
    486.83x = 155,545.83
  5. Step 5: Solve for x
    x = 155,545.83/486.83
  6. Step 6: Final answer
    x = 319.51

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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.