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Finding the Fourth Proportional to 2,009.87, 3,012.73 and 840.55

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Solution

The fourth proportional to 2,009.87, 3,012.73 and 840.55 is: 1,259.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,009.87 : 3,012.73 = 840.55 : x
  2. Step 2: Convert to fraction form
    2,009.87/3,012.73 = 840.55/x
  3. Step 3: Cross multiply
    2,009.87x = 3,012.73 × 840.55
  4. Step 4: Simplify right side
    2,009.87x = 2,532,350.20
  5. Step 5: Solve for x
    x = 2,532,350.20/2,009.87
  6. Step 6: Final answer
    x = 1,259.96

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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.