Home / 1,422.81-2,138.67-938.97

Finding the Fourth Proportional to 1,422.81, 2,138.67 and 938.97

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Solution

The fourth proportional to 1,422.81, 2,138.67 and 938.97 is: 1,411.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,422.81 : 2,138.67 = 938.97 : x
  2. Step 2: Convert to fraction form
    1,422.81/2,138.67 = 938.97/x
  3. Step 3: Cross multiply
    1,422.81x = 2,138.67 × 938.97
  4. Step 4: Simplify right side
    1,422.81x = 2,008,146.97
  5. Step 5: Solve for x
    x = 2,008,146.97/1,422.81
  6. Step 6: Final answer
    x = 1,411.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.