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Finding the Fourth Proportional to 400.32, 600.72 and 156.87

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Solution

The fourth proportional to 400.32, 600.72 and 156.87 is: 235.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.32 : 600.72 = 156.87 : x
  2. Step 2: Convert to fraction form
    400.32/600.72 = 156.87/x
  3. Step 3: Cross multiply
    400.32x = 600.72 × 156.87
  4. Step 4: Simplify right side
    400.32x = 94,234.95
  5. Step 5: Solve for x
    x = 94,234.95/400.32
  6. Step 6: Final answer
    x = 235.40

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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.