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Finding the Fourth Proportional to 1,320.84, 1,822.29 and 823.29

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Solution

The fourth proportional to 1,320.84, 1,822.29 and 823.29 is: 1,135.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320.84 : 1,822.29 = 823.29 : x
  2. Step 2: Convert to fraction form
    1,320.84/1,822.29 = 823.29/x
  3. Step 3: Cross multiply
    1,320.84x = 1,822.29 × 823.29
  4. Step 4: Simplify right side
    1,320.84x = 1,500,273.13
  5. Step 5: Solve for x
    x = 1,500,273.13/1,320.84
  6. Step 6: Final answer
    x = 1,135.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.