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Finding the Fourth Proportional to 576.21, 864.14 and 210.92

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Solution

The fourth proportional to 576.21, 864.14 and 210.92 is: 316.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.21 : 864.14 = 210.92 : x
  2. Step 2: Convert to fraction form
    576.21/864.14 = 210.92/x
  3. Step 3: Cross multiply
    576.21x = 864.14 × 210.92
  4. Step 4: Simplify right side
    576.21x = 182,259.03
  5. Step 5: Solve for x
    x = 182,259.03/576.21
  6. Step 6: Final answer
    x = 316.31

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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.