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Finding the Fourth Proportional to 822.96, 1,128.33 and 820.53

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Solution

The fourth proportional to 822.96, 1,128.33 and 820.53 is: 1,125.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    822.96 : 1,128.33 = 820.53 : x
  2. Step 2: Convert to fraction form
    822.96/1,128.33 = 820.53/x
  3. Step 3: Cross multiply
    822.96x = 1,128.33 × 820.53
  4. Step 4: Simplify right side
    822.96x = 925,828.61
  5. Step 5: Solve for x
    x = 925,828.61/822.96
  6. Step 6: Final answer
    x = 1,125.00

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.