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Finding the Fourth Proportional to 958.56, 1,436.63 and 519.81

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Solution

The fourth proportional to 958.56, 1,436.63 and 519.81 is: 779.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    958.56 : 1,436.63 = 519.81 : x
  2. Step 2: Convert to fraction form
    958.56/1,436.63 = 519.81/x
  3. Step 3: Cross multiply
    958.56x = 1,436.63 × 519.81
  4. Step 4: Simplify right side
    958.56x = 746,775.94
  5. Step 5: Solve for x
    x = 746,775.94/958.56
  6. Step 6: Final answer
    x = 779.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.