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Finding the Fourth Proportional to 2,137.93, 3,207.57 and 839.50

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Solution

The fourth proportional to 2,137.93, 3,207.57 and 839.50 is: 1,259.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,137.93 : 3,207.57 = 839.50 : x
  2. Step 2: Convert to fraction form
    2,137.93/3,207.57 = 839.50/x
  3. Step 3: Cross multiply
    2,137.93x = 3,207.57 × 839.50
  4. Step 4: Simplify right side
    2,137.93x = 2,692,755.02
  5. Step 5: Solve for x
    x = 2,692,755.02/2,137.93
  6. Step 6: Final answer
    x = 1,259.52

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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.