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Finding the Fourth Proportional to 2,486.31, 3,726.11 and 946.47

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Solution

The fourth proportional to 2,486.31, 3,726.11 and 946.47 is: 1,418.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,486.31 : 3,726.11 = 946.47 : x
  2. Step 2: Convert to fraction form
    2,486.31/3,726.11 = 946.47/x
  3. Step 3: Cross multiply
    2,486.31x = 3,726.11 × 946.47
  4. Step 4: Simplify right side
    2,486.31x = 3,526,646.60
  5. Step 5: Solve for x
    x = 3,526,646.60/2,486.31
  6. Step 6: Final answer
    x = 1,418.43

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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.