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Finding the Fourth Proportional to 1,907.94, 2,861.22 and 867.08

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Solution

The fourth proportional to 1,907.94, 2,861.22 and 867.08 is: 1,300.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,907.94 : 2,861.22 = 867.08 : x
  2. Step 2: Convert to fraction form
    1,907.94/2,861.22 = 867.08/x
  3. Step 3: Cross multiply
    1,907.94x = 2,861.22 × 867.08
  4. Step 4: Simplify right side
    1,907.94x = 2,480,906.64
  5. Step 5: Solve for x
    x = 2,480,906.64/1,907.94
  6. Step 6: Final answer
    x = 1,300.31

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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.