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Finding the Fourth Proportional to 1,928.90, 2,891.36 and 832.34

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Solution

The fourth proportional to 1,928.90, 2,891.36 and 832.34 is: 1,247.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,928.90 : 2,891.36 = 832.34 : x
  2. Step 2: Convert to fraction form
    1,928.90/2,891.36 = 832.34/x
  3. Step 3: Cross multiply
    1,928.90x = 2,891.36 × 832.34
  4. Step 4: Simplify right side
    1,928.90x = 2,406,594.58
  5. Step 5: Solve for x
    x = 2,406,594.58/1,928.90
  6. Step 6: Final answer
    x = 1,247.65

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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.