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Finding the Fourth Proportional to 2,854.49, 3,934.47 and 1,909.94

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Solution

The fourth proportional to 2,854.49, 3,934.47 and 1,909.94 is: 2,632.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,854.49 : 3,934.47 = 1,909.94 : x
  2. Step 2: Convert to fraction form
    2,854.49/3,934.47 = 1,909.94/x
  3. Step 3: Cross multiply
    2,854.49x = 3,934.47 × 1,909.94
  4. Step 4: Simplify right side
    2,854.49x = 7,514,581.96
  5. Step 5: Solve for x
    x = 7,514,581.96/2,854.49
  6. Step 6: Final answer
    x = 2,632.55

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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.