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Finding the Fourth Proportional to 576.99, 865.45 and 211.50

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Solution

The fourth proportional to 576.99, 865.45 and 211.50 is: 317.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    576.99 : 865.45 = 211.50 : x
  2. Step 2: Convert to fraction form
    576.99/865.45 = 211.50/x
  3. Step 3: Cross multiply
    576.99x = 865.45 × 211.50
  4. Step 4: Simplify right side
    576.99x = 183,042.68
  5. Step 5: Solve for x
    x = 183,042.68/576.99
  6. Step 6: Final answer
    x = 317.24

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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.