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Finding the Fourth Proportional to 397.87, 549.06 and 220.83

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Solution

The fourth proportional to 397.87, 549.06 and 220.83 is: 304.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    397.87 : 549.06 = 220.83 : x
  2. Step 2: Convert to fraction form
    397.87/549.06 = 220.83/x
  3. Step 3: Cross multiply
    397.87x = 549.06 × 220.83
  4. Step 4: Simplify right side
    397.87x = 121,248.92
  5. Step 5: Solve for x
    x = 121,248.92/397.87
  6. Step 6: Final answer
    x = 304.75

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.