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Finding the Fourth Proportional to 1,402.90, 1,936.00 and 773.41

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Solution

The fourth proportional to 1,402.90, 1,936.00 and 773.41 is: 1,067.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,402.90 : 1,936.00 = 773.41 : x
  2. Step 2: Convert to fraction form
    1,402.90/1,936.00 = 773.41/x
  3. Step 3: Cross multiply
    1,402.90x = 1,936.00 × 773.41
  4. Step 4: Simplify right side
    1,402.90x = 1,497,314.99
  5. Step 5: Solve for x
    x = 1,497,314.99/1,402.90
  6. Step 6: Final answer
    x = 1,067.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.