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Finding the Fourth Proportional to 930.97, 1,396.58 and 822.31

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Solution

The fourth proportional to 930.97, 1,396.58 and 822.31 is: 1,233.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    930.97 : 1,396.58 = 822.31 : x
  2. Step 2: Convert to fraction form
    930.97/1,396.58 = 822.31/x
  3. Step 3: Cross multiply
    930.97x = 1,396.58 × 822.31
  4. Step 4: Simplify right side
    930.97x = 1,148,421.70
  5. Step 5: Solve for x
    x = 1,148,421.70/930.97
  6. Step 6: Final answer
    x = 1,233.58

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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.