Home / 1,661.27-2,292.51-905.03

Finding the Fourth Proportional to 1,661.27, 2,292.51 and 905.03

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Solution

The fourth proportional to 1,661.27, 2,292.51 and 905.03 is: 1,248.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,661.27 : 2,292.51 = 905.03 : x
  2. Step 2: Convert to fraction form
    1,661.27/2,292.51 = 905.03/x
  3. Step 3: Cross multiply
    1,661.27x = 2,292.51 × 905.03
  4. Step 4: Simplify right side
    1,661.27x = 2,074,796.11
  5. Step 5: Solve for x
    x = 2,074,796.11/1,661.27
  6. Step 6: Final answer
    x = 1,248.92

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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.