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Finding the Fourth Proportional to 958.03, 1,322.83 and 643.34

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Solution

The fourth proportional to 958.03, 1,322.83 and 643.34 is: 888.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    958.03 : 1,322.83 = 643.34 : x
  2. Step 2: Convert to fraction form
    958.03/1,322.83 = 643.34/x
  3. Step 3: Cross multiply
    958.03x = 1,322.83 × 643.34
  4. Step 4: Simplify right side
    958.03x = 851,033.56
  5. Step 5: Solve for x
    x = 851,033.56/958.03
  6. Step 6: Final answer
    x = 888.32

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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.