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Finding the Fourth Proportional to 2,812.80, 3,881.94 and 1,633.80

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Solution

The fourth proportional to 2,812.80, 3,881.94 and 1,633.80 is: 2,254.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,812.80 : 3,881.94 = 1,633.80 : x
  2. Step 2: Convert to fraction form
    2,812.80/3,881.94 = 1,633.80/x
  3. Step 3: Cross multiply
    2,812.80x = 3,881.94 × 1,633.80
  4. Step 4: Simplify right side
    2,812.80x = 6,342,313.57
  5. Step 5: Solve for x
    x = 6,342,313.57/2,812.80
  6. Step 6: Final answer
    x = 2,254.80

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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.