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Finding the Fourth Proportional to 709.55, 1,064.36 and 222.61

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Solution

The fourth proportional to 709.55, 1,064.36 and 222.61 is: 333.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    709.55 : 1,064.36 = 222.61 : x
  2. Step 2: Convert to fraction form
    709.55/1,064.36 = 222.61/x
  3. Step 3: Cross multiply
    709.55x = 1,064.36 × 222.61
  4. Step 4: Simplify right side
    709.55x = 236,937.18
  5. Step 5: Solve for x
    x = 236,937.18/709.55
  6. Step 6: Final answer
    x = 333.93

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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.