Home / 1,631.23-2,447.33-938.40

Finding the Fourth Proportional to 1,631.23, 2,447.33 and 938.40

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Solution

The fourth proportional to 1,631.23, 2,447.33 and 938.40 is: 1,407.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,631.23 : 2,447.33 = 938.40 : x
  2. Step 2: Convert to fraction form
    1,631.23/2,447.33 = 938.40/x
  3. Step 3: Cross multiply
    1,631.23x = 2,447.33 × 938.40
  4. Step 4: Simplify right side
    1,631.23x = 2,296,571.30
  5. Step 5: Solve for x
    x = 2,296,571.30/1,631.23
  6. Step 6: Final answer
    x = 1,407.87

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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.