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Finding the Fourth Proportional to 958.32, 1,322.28 and 626.64

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Solution

The fourth proportional to 958.32, 1,322.28 and 626.64 is: 864.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    958.32 : 1,322.28 = 626.64 : x
  2. Step 2: Convert to fraction form
    958.32/1,322.28 = 626.64/x
  3. Step 3: Cross multiply
    958.32x = 1,322.28 × 626.64
  4. Step 4: Simplify right side
    958.32x = 828,593.54
  5. Step 5: Solve for x
    x = 828,593.54/958.32
  6. Step 6: Final answer
    x = 864.63

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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.