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Finding the Fourth Proportional to 2,007.92, 2,771.48 and 1,221.96

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Solution

The fourth proportional to 2,007.92, 2,771.48 and 1,221.96 is: 1,686.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,007.92 : 2,771.48 = 1,221.96 : x
  2. Step 2: Convert to fraction form
    2,007.92/2,771.48 = 1,221.96/x
  3. Step 3: Cross multiply
    2,007.92x = 2,771.48 × 1,221.96
  4. Step 4: Simplify right side
    2,007.92x = 3,386,637.70
  5. Step 5: Solve for x
    x = 3,386,637.70/2,007.92
  6. Step 6: Final answer
    x = 1,686.64

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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.