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Finding the Fourth Proportional to 397.90, 597.30 and 235.72

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Solution

The fourth proportional to 397.90, 597.30 and 235.72 is: 353.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    397.90 : 597.30 = 235.72 : x
  2. Step 2: Convert to fraction form
    397.90/597.30 = 235.72/x
  3. Step 3: Cross multiply
    397.90x = 597.30 × 235.72
  4. Step 4: Simplify right side
    397.90x = 140,795.56
  5. Step 5: Solve for x
    x = 140,795.56/397.90
  6. Step 6: Final answer
    x = 353.85

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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.