Home / 2,172.47-3,256.19-938.63

Finding the Fourth Proportional to 2,172.47, 3,256.19 and 938.63

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Solution

The fourth proportional to 2,172.47, 3,256.19 and 938.63 is: 1,406.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,172.47 : 3,256.19 = 938.63 : x
  2. Step 2: Convert to fraction form
    2,172.47/3,256.19 = 938.63/x
  3. Step 3: Cross multiply
    2,172.47x = 3,256.19 × 938.63
  4. Step 4: Simplify right side
    2,172.47x = 3,056,357.62
  5. Step 5: Solve for x
    x = 3,056,357.62/2,172.47
  6. Step 6: Final answer
    x = 1,406.86

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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.