Home / 2,181.28-3,010.40-1,297.28

Finding the Fourth Proportional to 2,181.28, 3,010.40 and 1,297.28

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Solution

The fourth proportional to 2,181.28, 3,010.40 and 1,297.28 is: 1,790.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,181.28 : 3,010.40 = 1,297.28 : x
  2. Step 2: Convert to fraction form
    2,181.28/3,010.40 = 1,297.28/x
  3. Step 3: Cross multiply
    2,181.28x = 3,010.40 × 1,297.28
  4. Step 4: Simplify right side
    2,181.28x = 3,905,331.71
  5. Step 5: Solve for x
    x = 3,905,331.71/2,181.28
  6. Step 6: Final answer
    x = 1,790.39

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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.