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Finding the Fourth Proportional to 400.72, 603.40 and 367.12

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Solution

The fourth proportional to 400.72, 603.40 and 367.12 is: 552.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    400.72 : 603.40 = 367.12 : x
  2. Step 2: Convert to fraction form
    400.72/603.40 = 367.12/x
  3. Step 3: Cross multiply
    400.72x = 603.40 × 367.12
  4. Step 4: Simplify right side
    400.72x = 221,520.21
  5. Step 5: Solve for x
    x = 221,520.21/400.72
  6. Step 6: Final answer
    x = 552.81

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.