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Finding the Fourth Proportional to 1,620.80, 2,236.75 and 922.22

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Solution

The fourth proportional to 1,620.80, 2,236.75 and 922.22 is: 1,272.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,620.80 : 2,236.75 = 922.22 : x
  2. Step 2: Convert to fraction form
    1,620.80/2,236.75 = 922.22/x
  3. Step 3: Cross multiply
    1,620.80x = 2,236.75 × 922.22
  4. Step 4: Simplify right side
    1,620.80x = 2,062,762.10
  5. Step 5: Solve for x
    x = 2,062,762.10/1,620.80
  6. Step 6: Final answer
    x = 1,272.69

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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.