Home / 2,140.81-2,954.34-1,256.90

Finding the Fourth Proportional to 2,140.81, 2,954.34 and 1,256.90

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Solution

The fourth proportional to 2,140.81, 2,954.34 and 1,256.90 is: 1,734.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,140.81 : 2,954.34 = 1,256.90 : x
  2. Step 2: Convert to fraction form
    2,140.81/2,954.34 = 1,256.90/x
  3. Step 3: Cross multiply
    2,140.81x = 2,954.34 × 1,256.90
  4. Step 4: Simplify right side
    2,140.81x = 3,713,295.17
  5. Step 5: Solve for x
    x = 3,713,295.17/2,140.81
  6. Step 6: Final answer
    x = 1,734.53

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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.