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Finding the Fourth Proportional to 1,243.82, 1,865.75 and 378.14

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Solution

The fourth proportional to 1,243.82, 1,865.75 and 378.14 is: 567.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,243.82 : 1,865.75 = 378.14 : x
  2. Step 2: Convert to fraction form
    1,243.82/1,865.75 = 378.14/x
  3. Step 3: Cross multiply
    1,243.82x = 1,865.75 × 378.14
  4. Step 4: Simplify right side
    1,243.82x = 705,503.49
  5. Step 5: Solve for x
    x = 705,503.49/1,243.82
  6. Step 6: Final answer
    x = 567.21

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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.