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Finding the Fourth Proportional to 2,918.15, 4,027.11 and 1,591.89

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Solution

The fourth proportional to 2,918.15, 4,027.11 and 1,591.89 is: 2,196.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,918.15 : 4,027.11 = 1,591.89 : x
  2. Step 2: Convert to fraction form
    2,918.15/4,027.11 = 1,591.89/x
  3. Step 3: Cross multiply
    2,918.15x = 4,027.11 × 1,591.89
  4. Step 4: Simplify right side
    2,918.15x = 6,410,708.18
  5. Step 5: Solve for x
    x = 6,410,708.18/2,918.15
  6. Step 6: Final answer
    x = 2,196.84

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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.