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Finding the Fourth Proportional to 1,928.25, 2,891.88 and 541.23

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Solution

The fourth proportional to 1,928.25, 2,891.88 and 541.23 is: 811.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,928.25 : 2,891.88 = 541.23 : x
  2. Step 2: Convert to fraction form
    1,928.25/2,891.88 = 541.23/x
  3. Step 3: Cross multiply
    1,928.25x = 2,891.88 × 541.23
  4. Step 4: Simplify right side
    1,928.25x = 1,565,172.21
  5. Step 5: Solve for x
    x = 1,565,172.21/1,928.25
  6. Step 6: Final answer
    x = 811.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.