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Finding the Fourth Proportional to 958.85, 1,323.20 and 539.22

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Solution

The fourth proportional to 958.85, 1,323.20 and 539.22 is: 744.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    958.85 : 1,323.20 = 539.22 : x
  2. Step 2: Convert to fraction form
    958.85/1,323.20 = 539.22/x
  3. Step 3: Cross multiply
    958.85x = 1,323.20 × 539.22
  4. Step 4: Simplify right side
    958.85x = 713,495.90
  5. Step 5: Solve for x
    x = 713,495.90/958.85
  6. Step 6: Final answer
    x = 744.12

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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.