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Finding the Fourth Proportional to 821.90, 1,232.50 and 301.73

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Solution

The fourth proportional to 821.90, 1,232.50 and 301.73 is: 452.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    821.90 : 1,232.50 = 301.73 : x
  2. Step 2: Convert to fraction form
    821.90/1,232.50 = 301.73/x
  3. Step 3: Cross multiply
    821.90x = 1,232.50 × 301.73
  4. Step 4: Simplify right side
    821.90x = 371,881.47
  5. Step 5: Solve for x
    x = 371,881.47/821.90
  6. Step 6: Final answer
    x = 452.47

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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.