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Finding the Fourth Proportional to 958.26, 1,320.27 and 663.12

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Solution

The fourth proportional to 958.26, 1,320.27 and 663.12 is: 913.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    958.26 : 1,320.27 = 663.12 : x
  2. Step 2: Convert to fraction form
    958.26/1,320.27 = 663.12/x
  3. Step 3: Cross multiply
    958.26x = 1,320.27 × 663.12
  4. Step 4: Simplify right side
    958.26x = 875,497.44
  5. Step 5: Solve for x
    x = 875,497.44/958.26
  6. Step 6: Final answer
    x = 913.63

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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.