Home / 2,917.39-4,027.49-1,978.15

Finding the Fourth Proportional to 2,917.39, 4,027.49 and 1,978.15

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Solution

The fourth proportional to 2,917.39, 4,027.49 and 1,978.15 is: 2,730.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,917.39 : 4,027.49 = 1,978.15 : x
  2. Step 2: Convert to fraction form
    2,917.39/4,027.49 = 1,978.15/x
  3. Step 3: Cross multiply
    2,917.39x = 4,027.49 × 1,978.15
  4. Step 4: Simplify right side
    2,917.39x = 7,966,979.34
  5. Step 5: Solve for x
    x = 7,966,979.34/2,917.39
  6. Step 6: Final answer
    x = 2,730.86

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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.