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Finding the Fourth Proportional to 1,869.22, 2,802.78 and 774.37

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Solution

The fourth proportional to 1,869.22, 2,802.78 and 774.37 is: 1,161.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,869.22 : 2,802.78 = 774.37 : x
  2. Step 2: Convert to fraction form
    1,869.22/2,802.78 = 774.37/x
  3. Step 3: Cross multiply
    1,869.22x = 2,802.78 × 774.37
  4. Step 4: Simplify right side
    1,869.22x = 2,170,388.75
  5. Step 5: Solve for x
    x = 2,170,388.75/1,869.22
  6. Step 6: Final answer
    x = 1,161.12

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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.