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Finding the Fourth Proportional to 471.15, 706.82 and 239.85

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Solution

The fourth proportional to 471.15, 706.82 and 239.85 is: 359.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    471.15 : 706.82 = 239.85 : x
  2. Step 2: Convert to fraction form
    471.15/706.82 = 239.85/x
  3. Step 3: Cross multiply
    471.15x = 706.82 × 239.85
  4. Step 4: Simplify right side
    471.15x = 169,529.58
  5. Step 5: Solve for x
    x = 169,529.58/471.15
  6. Step 6: Final answer
    x = 359.82

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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.