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Finding the Fourth Proportional to 2,922.47, 4,383.85 and 842.79

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Solution

The fourth proportional to 2,922.47, 4,383.85 and 842.79 is: 1,264.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,922.47 : 4,383.85 = 842.79 : x
  2. Step 2: Convert to fraction form
    2,922.47/4,383.85 = 842.79/x
  3. Step 3: Cross multiply
    2,922.47x = 4,383.85 × 842.79
  4. Step 4: Simplify right side
    2,922.47x = 3,694,664.94
  5. Step 5: Solve for x
    x = 3,694,664.94/2,922.47
  6. Step 6: Final answer
    x = 1,264.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.