Home / 1,617.79-2,232.66-919.21

Finding the Fourth Proportional to 1,617.79, 2,232.66 and 919.21

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Solution

The fourth proportional to 1,617.79, 2,232.66 and 919.21 is: 1,268.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,617.79 : 2,232.66 = 919.21 : x
  2. Step 2: Convert to fraction form
    1,617.79/2,232.66 = 919.21/x
  3. Step 3: Cross multiply
    1,617.79x = 2,232.66 × 919.21
  4. Step 4: Simplify right side
    1,617.79x = 2,052,283.40
  5. Step 5: Solve for x
    x = 2,052,283.40/1,617.79
  6. Step 6: Final answer
    x = 1,268.57

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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.