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Finding the Fourth Proportional to 1,844.70, 2,767.95 and 1,405.80

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Solution

The fourth proportional to 1,844.70, 2,767.95 and 1,405.80 is: 2,109.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,844.70 : 2,767.95 = 1,405.80 : x
  2. Step 2: Convert to fraction form
    1,844.70/2,767.95 = 1,405.80/x
  3. Step 3: Cross multiply
    1,844.70x = 2,767.95 × 1,405.80
  4. Step 4: Simplify right side
    1,844.70x = 3,891,184.11
  5. Step 5: Solve for x
    x = 3,891,184.11/1,844.70
  6. Step 6: Final answer
    x = 2,109.39

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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.