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Finding the Fourth Proportional to 2,986.76, 4,473.31 and 1,427.86

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Solution

The fourth proportional to 2,986.76, 4,473.31 and 1,427.86 is: 2,138.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,986.76 : 4,473.31 = 1,427.86 : x
  2. Step 2: Convert to fraction form
    2,986.76/4,473.31 = 1,427.86/x
  3. Step 3: Cross multiply
    2,986.76x = 4,473.31 × 1,427.86
  4. Step 4: Simplify right side
    2,986.76x = 6,387,230.91
  5. Step 5: Solve for x
    x = 6,387,230.91/2,986.76
  6. Step 6: Final answer
    x = 2,138.51

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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.