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Finding the Fourth Proportional to 2,881.70, 3,976.80 and 1,622.72

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Solution

The fourth proportional to 2,881.70, 3,976.80 and 1,622.72 is: 2,239.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,881.70 : 3,976.80 = 1,622.72 : x
  2. Step 2: Convert to fraction form
    2,881.70/3,976.80 = 1,622.72/x
  3. Step 3: Cross multiply
    2,881.70x = 3,976.80 × 1,622.72
  4. Step 4: Simplify right side
    2,881.70x = 6,453,232.90
  5. Step 5: Solve for x
    x = 6,453,232.90/2,881.70
  6. Step 6: Final answer
    x = 2,239.38

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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.