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Finding the Fourth Proportional to 1,893.15, 2,839.97 and 782.39

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Solution

The fourth proportional to 1,893.15, 2,839.97 and 782.39 is: 1,173.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,893.15 : 2,839.97 = 782.39 : x
  2. Step 2: Convert to fraction form
    1,893.15/2,839.97 = 782.39/x
  3. Step 3: Cross multiply
    1,893.15x = 2,839.97 × 782.39
  4. Step 4: Simplify right side
    1,893.15x = 2,221,973.18
  5. Step 5: Solve for x
    x = 2,221,973.18/1,893.15
  6. Step 6: Final answer
    x = 1,173.69

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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.