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Finding the Fourth Proportional to 958.14, 1,321.79 and 608.63

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Solution

The fourth proportional to 958.14, 1,321.79 and 608.63 is: 839.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    958.14 : 1,321.79 = 608.63 : x
  2. Step 2: Convert to fraction form
    958.14/1,321.79 = 608.63/x
  3. Step 3: Cross multiply
    958.14x = 1,321.79 × 608.63
  4. Step 4: Simplify right side
    958.14x = 804,471.40
  5. Step 5: Solve for x
    x = 804,471.40/958.14
  6. Step 6: Final answer
    x = 839.62

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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.