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Finding the Fourth Proportional to 401.15, 553.23 and 276.62

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Solution

The fourth proportional to 401.15, 553.23 and 276.62 is: 381.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.15 : 553.23 = 276.62 : x
  2. Step 2: Convert to fraction form
    401.15/553.23 = 276.62/x
  3. Step 3: Cross multiply
    401.15x = 553.23 × 276.62
  4. Step 4: Simplify right side
    401.15x = 153,031.72
  5. Step 5: Solve for x
    x = 153,031.72/401.15
  6. Step 6: Final answer
    x = 381.48

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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.