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Finding the Fourth Proportional to 400.74, 600.79 and 157.22

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Solution

The fourth proportional to 400.74, 600.79 and 157.22 is: 235.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.74 : 600.79 = 157.22 : x
  2. Step 2: Convert to fraction form
    400.74/600.79 = 157.22/x
  3. Step 3: Cross multiply
    400.74x = 600.79 × 157.22
  4. Step 4: Simplify right side
    400.74x = 94,456.20
  5. Step 5: Solve for x
    x = 94,456.20/400.74
  6. Step 6: Final answer
    x = 235.70

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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.