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Finding the Fourth Proportional to 400.56, 552.83 and 290.40

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Solution

The fourth proportional to 400.56, 552.83 and 290.40 is: 400.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.56 : 552.83 = 290.40 : x
  2. Step 2: Convert to fraction form
    400.56/552.83 = 290.40/x
  3. Step 3: Cross multiply
    400.56x = 552.83 × 290.40
  4. Step 4: Simplify right side
    400.56x = 160,540.38
  5. Step 5: Solve for x
    x = 160,540.38/400.56
  6. Step 6: Final answer
    x = 400.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.