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Finding the Fourth Proportional to 400.60, 553.08 and 251.38

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Solution

The fourth proportional to 400.60, 553.08 and 251.38 is: 347.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.60 : 553.08 = 251.38 : x
  2. Step 2: Convert to fraction form
    400.60/553.08 = 251.38/x
  3. Step 3: Cross multiply
    400.60x = 553.08 × 251.38
  4. Step 4: Simplify right side
    400.60x = 139,033.25
  5. Step 5: Solve for x
    x = 139,033.25/400.60
  6. Step 6: Final answer
    x = 347.06

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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.