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Finding the Fourth Proportional to 822.78, 1,228.30 and 793.94

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Solution

The fourth proportional to 822.78, 1,228.30 and 793.94 is: 1,185.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    822.78 : 1,228.30 = 793.94 : x
  2. Step 2: Convert to fraction form
    822.78/1,228.30 = 793.94/x
  3. Step 3: Cross multiply
    822.78x = 1,228.30 × 793.94
  4. Step 4: Simplify right side
    822.78x = 975,196.50
  5. Step 5: Solve for x
    x = 975,196.50/822.78
  6. Step 6: Final answer
    x = 1,185.25

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.