Home / 1,928.34-2,661.13-1,171.90

Finding the Fourth Proportional to 1,928.34, 2,661.13 and 1,171.90

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Solution

The fourth proportional to 1,928.34, 2,661.13 and 1,171.90 is: 1,617.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,928.34 : 2,661.13 = 1,171.90 : x
  2. Step 2: Convert to fraction form
    1,928.34/2,661.13 = 1,171.90/x
  3. Step 3: Cross multiply
    1,928.34x = 2,661.13 × 1,171.90
  4. Step 4: Simplify right side
    1,928.34x = 3,118,583.04
  5. Step 5: Solve for x
    x = 3,118,583.04/1,928.34
  6. Step 6: Final answer
    x = 1,617.24

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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.