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Finding the Fourth Proportional to 2,876.86, 3,968.83 and 1,813.79

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Solution

The fourth proportional to 2,876.86, 3,968.83 and 1,813.79 is: 2,502.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,876.86 : 3,968.83 = 1,813.79 : x
  2. Step 2: Convert to fraction form
    2,876.86/3,968.83 = 1,813.79/x
  3. Step 3: Cross multiply
    2,876.86x = 3,968.83 × 1,813.79
  4. Step 4: Simplify right side
    2,876.86x = 7,198,624.17
  5. Step 5: Solve for x
    x = 7,198,624.17/2,876.86
  6. Step 6: Final answer
    x = 2,502.25

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1.5x scale

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.