Home / 1,664.28-2,297.60-1,290.42

Finding the Fourth Proportional to 1,664.28, 2,297.60 and 1,290.42

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Solution

The fourth proportional to 1,664.28, 2,297.60 and 1,290.42 is: 1,781.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,664.28 : 2,297.60 = 1,290.42 : x
  2. Step 2: Convert to fraction form
    1,664.28/2,297.60 = 1,290.42/x
  3. Step 3: Cross multiply
    1,664.28x = 2,297.60 × 1,290.42
  4. Step 4: Simplify right side
    1,664.28x = 2,964,862.54
  5. Step 5: Solve for x
    x = 2,964,862.54/1,664.28
  6. Step 6: Final answer
    x = 1,781.47

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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.