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Finding the Fourth Proportional to 400.61, 553.23 and 276.59

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Solution

The fourth proportional to 400.61, 553.23 and 276.59 is: 381.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.61 : 553.23 = 276.59 : x
  2. Step 2: Convert to fraction form
    400.61/553.23 = 276.59/x
  3. Step 3: Cross multiply
    400.61x = 553.23 × 276.59
  4. Step 4: Simplify right side
    400.61x = 153,015.12
  5. Step 5: Solve for x
    x = 153,015.12/400.61
  6. Step 6: Final answer
    x = 381.96

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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.