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Finding the Fourth Proportional to 397.89, 597.68 and 243.90

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Solution

The fourth proportional to 397.89, 597.68 and 243.90 is: 366.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    397.89 : 597.68 = 243.90 : x
  2. Step 2: Convert to fraction form
    397.89/597.68 = 243.90/x
  3. Step 3: Cross multiply
    397.89x = 597.68 × 243.90
  4. Step 4: Simplify right side
    397.89x = 145,774.15
  5. Step 5: Solve for x
    x = 145,774.15/397.89
  6. Step 6: Final answer
    x = 366.37

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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.