Home / 2,172.78-2,998.38-1,241.28

Finding the Fourth Proportional to 2,172.78, 2,998.38 and 1,241.28

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Solution

The fourth proportional to 2,172.78, 2,998.38 and 1,241.28 is: 1,712.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,172.78 : 2,998.38 = 1,241.28 : x
  2. Step 2: Convert to fraction form
    2,172.78/2,998.38 = 1,241.28/x
  3. Step 3: Cross multiply
    2,172.78x = 2,998.38 × 1,241.28
  4. Step 4: Simplify right side
    2,172.78x = 3,721,829.13
  5. Step 5: Solve for x
    x = 3,721,829.13/2,172.78
  6. Step 6: Final answer
    x = 1,712.93

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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.