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Finding the Fourth Proportional to 1,329.84, 1,836.83 and 938.61

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Solution

The fourth proportional to 1,329.84, 1,836.83 and 938.61 is: 1,296.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,329.84 : 1,836.83 = 938.61 : x
  2. Step 2: Convert to fraction form
    1,329.84/1,836.83 = 938.61/x
  3. Step 3: Cross multiply
    1,329.84x = 1,836.83 × 938.61
  4. Step 4: Simplify right side
    1,329.84x = 1,724,062.31
  5. Step 5: Solve for x
    x = 1,724,062.31/1,329.84
  6. Step 6: Final answer
    x = 1,296.44

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1.5x scale

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.