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Finding the Fourth Proportional to 400.55, 600.89 and 153.74

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Solution

The fourth proportional to 400.55, 600.89 and 153.74 is: 230.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.55 : 600.89 = 153.74 : x
  2. Step 2: Convert to fraction form
    400.55/600.89 = 153.74/x
  3. Step 3: Cross multiply
    400.55x = 600.89 × 153.74
  4. Step 4: Simplify right side
    400.55x = 92,381.99
  5. Step 5: Solve for x
    x = 92,381.99/400.55
  6. Step 6: Final answer
    x = 230.64

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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.