Home / 1,568.60-2,164.95-905.36

Finding the Fourth Proportional to 1,568.60, 2,164.95 and 905.36

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Solution

The fourth proportional to 1,568.60, 2,164.95 and 905.36 is: 1,249.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,568.60 : 2,164.95 = 905.36 : x
  2. Step 2: Convert to fraction form
    1,568.60/2,164.95 = 905.36/x
  3. Step 3: Cross multiply
    1,568.60x = 2,164.95 × 905.36
  4. Step 4: Simplify right side
    1,568.60x = 1,960,059.13
  5. Step 5: Solve for x
    x = 1,960,059.13/1,568.60
  6. Step 6: Final answer
    x = 1,249.56

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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.