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Finding the Fourth Proportional to 2,747.02, 4,118.14 and 991.75

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Solution

The fourth proportional to 2,747.02, 4,118.14 and 991.75 is: 1,486.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,747.02 : 4,118.14 = 991.75 : x
  2. Step 2: Convert to fraction form
    2,747.02/4,118.14 = 991.75/x
  3. Step 3: Cross multiply
    2,747.02x = 4,118.14 × 991.75
  4. Step 4: Simplify right side
    2,747.02x = 4,084,165.35
  5. Step 5: Solve for x
    x = 4,084,165.35/2,747.02
  6. Step 6: Final answer
    x = 1,486.76

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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.