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Finding the Fourth Proportional to 1,083.20, 1,494.94 and 663.84

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Solution

The fourth proportional to 1,083.20, 1,494.94 and 663.84 is: 916.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,083.20 : 1,494.94 = 663.84 : x
  2. Step 2: Convert to fraction form
    1,083.20/1,494.94 = 663.84/x
  3. Step 3: Cross multiply
    1,083.20x = 1,494.94 × 663.84
  4. Step 4: Simplify right side
    1,083.20x = 992,400.97
  5. Step 5: Solve for x
    x = 992,400.97/1,083.20
  6. Step 6: Final answer
    x = 916.18

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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.