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Finding the Fourth Proportional to 958.23, 1,321.65 and 622.22

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Solution

The fourth proportional to 958.23, 1,321.65 and 622.22 is: 858.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    958.23 : 1,321.65 = 622.22 : x
  2. Step 2: Convert to fraction form
    958.23/1,321.65 = 622.22/x
  3. Step 3: Cross multiply
    958.23x = 1,321.65 × 622.22
  4. Step 4: Simplify right side
    958.23x = 822,350.45
  5. Step 5: Solve for x
    x = 822,350.45/958.23
  6. Step 6: Final answer
    x = 858.20

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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.