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Finding the Fourth Proportional to 397.85, 549.03 and 242.60

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Solution

The fourth proportional to 397.85, 549.03 and 242.60 is: 334.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    397.85 : 549.03 = 242.60 : x
  2. Step 2: Convert to fraction form
    397.85/549.03 = 242.60/x
  3. Step 3: Cross multiply
    397.85x = 549.03 × 242.60
  4. Step 4: Simplify right side
    397.85x = 133,190.72
  5. Step 5: Solve for x
    x = 133,190.72/397.85
  6. Step 6: Final answer
    x = 334.78

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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.