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Finding the Fourth Proportional to 575.22, 862.71 and 209.91

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Solution

The fourth proportional to 575.22, 862.71 and 209.91 is: 314.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    575.22 : 862.71 = 209.91 : x
  2. Step 2: Convert to fraction form
    575.22/862.71 = 209.91/x
  3. Step 3: Cross multiply
    575.22x = 862.71 × 209.91
  4. Step 4: Simplify right side
    575.22x = 181,091.46
  5. Step 5: Solve for x
    x = 181,091.46/575.22
  6. Step 6: Final answer
    x = 314.82

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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.