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Finding the Fourth Proportional to 1,928.88, 2,891.57 and 889.02

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Solution

The fourth proportional to 1,928.88, 2,891.57 and 889.02 is: 1,332.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,928.88 : 2,891.57 = 889.02 : x
  2. Step 2: Convert to fraction form
    1,928.88/2,891.57 = 889.02/x
  3. Step 3: Cross multiply
    1,928.88x = 2,891.57 × 889.02
  4. Step 4: Simplify right side
    1,928.88x = 2,570,659.12
  5. Step 5: Solve for x
    x = 2,570,659.12/1,928.88
  6. Step 6: Final answer
    x = 1,332.72

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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.