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Finding the Fourth Proportional to 4,978.92, 6,871.86 and 2,883

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Solution

The fourth proportional to 4,978.92, 6,871.86 and 2,883 is: 3,979.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,978.92 : 6,871.86 = 2,883 : x
  2. Step 2: Convert to fraction form
    4,978.92/6,871.86 = 2,883/x
  3. Step 3: Cross multiply
    4,978.92x = 6,871.86 × 2,883
  4. Step 4: Simplify right side
    4,978.92x = 19,811,572.38
  5. Step 5: Solve for x
    x = 19,811,572.38/4,978.92
  6. Step 6: Final answer
    x = 3,979.09

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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.