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Finding the Fourth Proportional to 471.31, 706.91 and 288.61

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Solution

The fourth proportional to 471.31, 706.91 and 288.61 is: 432.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    471.31 : 706.91 = 288.61 : x
  2. Step 2: Convert to fraction form
    471.31/706.91 = 288.61/x
  3. Step 3: Cross multiply
    471.31x = 706.91 × 288.61
  4. Step 4: Simplify right side
    471.31x = 204,018.48
  5. Step 5: Solve for x
    x = 204,018.48/471.31
  6. Step 6: Final answer
    x = 432.88

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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.