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Finding the Fourth Proportional to 1,684.38, 2,324.38 and 938.29

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Solution

The fourth proportional to 1,684.38, 2,324.38 and 938.29 is: 1,294.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,684.38 : 2,324.38 = 938.29 : x
  2. Step 2: Convert to fraction form
    1,684.38/2,324.38 = 938.29/x
  3. Step 3: Cross multiply
    1,684.38x = 2,324.38 × 938.29
  4. Step 4: Simplify right side
    1,684.38x = 2,180,942.51
  5. Step 5: Solve for x
    x = 2,180,942.51/1,684.38
  6. Step 6: Final answer
    x = 1,294.80

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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.