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Finding the Fourth Proportional to 445.50, 614.30 and 401.31

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Solution

The fourth proportional to 445.50, 614.30 and 401.31 is: 553.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    445.50 : 614.30 = 401.31 : x
  2. Step 2: Convert to fraction form
    445.50/614.30 = 401.31/x
  3. Step 3: Cross multiply
    445.50x = 614.30 × 401.31
  4. Step 4: Simplify right side
    445.50x = 246,522.73
  5. Step 5: Solve for x
    x = 246,522.73/445.50
  6. Step 6: Final answer
    x = 553.36

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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.