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Finding the Fourth Proportional to 709.13, 1,063.69 and 222.19

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Solution

The fourth proportional to 709.13, 1,063.69 and 222.19 is: 333.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    709.13 : 1,063.69 = 222.19 : x
  2. Step 2: Convert to fraction form
    709.13/1,063.69 = 222.19/x
  3. Step 3: Cross multiply
    709.13x = 1,063.69 × 222.19
  4. Step 4: Simplify right side
    709.13x = 236,338.07
  5. Step 5: Solve for x
    x = 236,338.07/709.13
  6. Step 6: Final answer
    x = 333.28

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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.