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Finding the Fourth Proportional to 958.32, 1,321.94 and 617.06

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Solution

The fourth proportional to 958.32, 1,321.94 and 617.06 is: 851.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    958.32 : 1,321.94 = 617.06 : x
  2. Step 2: Convert to fraction form
    958.32/1,321.94 = 617.06/x
  3. Step 3: Cross multiply
    958.32x = 1,321.94 × 617.06
  4. Step 4: Simplify right side
    958.32x = 815,721.14
  5. Step 5: Solve for x
    x = 815,721.14/958.32
  6. Step 6: Final answer
    x = 851.20

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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.