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Finding the Fourth Proportional to 400.96, 601.40 and 157.42

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Solution

The fourth proportional to 400.96, 601.40 and 157.42 is: 236.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.96 : 601.40 = 157.42 : x
  2. Step 2: Convert to fraction form
    400.96/601.40 = 157.42/x
  3. Step 3: Cross multiply
    400.96x = 601.40 × 157.42
  4. Step 4: Simplify right side
    400.96x = 94,671.28
  5. Step 5: Solve for x
    x = 94,671.28/400.96
  6. Step 6: Final answer
    x = 236.11

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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.