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Finding the Fourth Proportional to 2,605.06, 3,907.86 and 850

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Solution

The fourth proportional to 2,605.06, 3,907.86 and 850 is: 1,275.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,605.06 : 3,907.86 = 850 : x
  2. Step 2: Convert to fraction form
    2,605.06/3,907.86 = 850/x
  3. Step 3: Cross multiply
    2,605.06x = 3,907.86 × 850
  4. Step 4: Simplify right side
    2,605.06x = 3,321,681
  5. Step 5: Solve for x
    x = 3,321,681/2,605.06
  6. Step 6: Final answer
    x = 1,275.09

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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.