Home / 2,921.46-4,030.74-2,640.80

Finding the Fourth Proportional to 2,921.46, 4,030.74 and 2,640.80

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Solution

The fourth proportional to 2,921.46, 4,030.74 and 2,640.80 is: 3,643.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,921.46 : 4,030.74 = 2,640.80 : x
  2. Step 2: Convert to fraction form
    2,921.46/4,030.74 = 2,640.80/x
  3. Step 3: Cross multiply
    2,921.46x = 4,030.74 × 2,640.80
  4. Step 4: Simplify right side
    2,921.46x = 10,644,358.04
  5. Step 5: Solve for x
    x = 10,644,358.04/2,921.46
  6. Step 6: Final answer
    x = 3,643.51

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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.