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Finding the Fourth Proportional to 1,243.14, 1,862.37 and 626.82

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Solution

The fourth proportional to 1,243.14, 1,862.37 and 626.82 is: 939.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,243.14 : 1,862.37 = 626.82 : x
  2. Step 2: Convert to fraction form
    1,243.14/1,862.37 = 626.82/x
  3. Step 3: Cross multiply
    1,243.14x = 1,862.37 × 626.82
  4. Step 4: Simplify right side
    1,243.14x = 1,167,370.76
  5. Step 5: Solve for x
    x = 1,167,370.76/1,243.14
  6. Step 6: Final answer
    x = 939.05

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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.