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Finding the Fourth Proportional to 958.22, 1,322.38 and 622.19

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Solution

The fourth proportional to 958.22, 1,322.38 and 622.19 is: 858.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    958.22 : 1,322.38 = 622.19 : x
  2. Step 2: Convert to fraction form
    958.22/1,322.38 = 622.19/x
  3. Step 3: Cross multiply
    958.22x = 1,322.38 × 622.19
  4. Step 4: Simplify right side
    958.22x = 822,771.61
  5. Step 5: Solve for x
    x = 822,771.61/958.22
  6. Step 6: Final answer
    x = 858.65

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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.