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Finding the Fourth Proportional to 958.56, 1,323.26 and 722.61

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Solution

The fourth proportional to 958.56, 1,323.26 and 722.61 is: 997.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    958.56 : 1,323.26 = 722.61 : x
  2. Step 2: Convert to fraction form
    958.56/1,323.26 = 722.61/x
  3. Step 3: Cross multiply
    958.56x = 1,323.26 × 722.61
  4. Step 4: Simplify right side
    958.56x = 956,199.23
  5. Step 5: Solve for x
    x = 956,199.23/958.56
  6. Step 6: Final answer
    x = 997.53

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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.