Home / 1,568.28-2,164.40-905.16

Finding the Fourth Proportional to 1,568.28, 2,164.40 and 905.16

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Solution

The fourth proportional to 1,568.28, 2,164.40 and 905.16 is: 1,249.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,568.28 : 2,164.40 = 905.16 : x
  2. Step 2: Convert to fraction form
    1,568.28/2,164.40 = 905.16/x
  3. Step 3: Cross multiply
    1,568.28x = 2,164.40 × 905.16
  4. Step 4: Simplify right side
    1,568.28x = 1,959,128.30
  5. Step 5: Solve for x
    x = 1,959,128.30/1,568.28
  6. Step 6: Final answer
    x = 1,249.22

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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.