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Finding the Fourth Proportional to 397.44, 596.16 and 140.88

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Solution

The fourth proportional to 397.44, 596.16 and 140.88 is: 211.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    397.44 : 596.16 = 140.88 : x
  2. Step 2: Convert to fraction form
    397.44/596.16 = 140.88/x
  3. Step 3: Cross multiply
    397.44x = 596.16 × 140.88
  4. Step 4: Simplify right side
    397.44x = 83,987.02
  5. Step 5: Solve for x
    x = 83,987.02/397.44
  6. Step 6: Final answer
    x = 211.32

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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.