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Finding the Fourth Proportional to 958.19, 1,436.49 and 438.08

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Solution

The fourth proportional to 958.19, 1,436.49 and 438.08 is: 656.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    958.19 : 1,436.49 = 438.08 : x
  2. Step 2: Convert to fraction form
    958.19/1,436.49 = 438.08/x
  3. Step 3: Cross multiply
    958.19x = 1,436.49 × 438.08
  4. Step 4: Simplify right side
    958.19x = 629,290.36
  5. Step 5: Solve for x
    x = 629,290.36/958.19
  6. Step 6: Final answer
    x = 656.75

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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.