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Finding the Fourth Proportional to 821.37, 1,232.20 and 301.41

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Solution

The fourth proportional to 821.37, 1,232.20 and 301.41 is: 452.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    821.37 : 1,232.20 = 301.41 : x
  2. Step 2: Convert to fraction form
    821.37/1,232.20 = 301.41/x
  3. Step 3: Cross multiply
    821.37x = 1,232.20 × 301.41
  4. Step 4: Simplify right side
    821.37x = 371,397.40
  5. Step 5: Solve for x
    x = 371,397.40/821.37
  6. Step 6: Final answer
    x = 452.17

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.