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Finding the Fourth Proportional to 394.88, 592.69 and 209.92

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Solution

The fourth proportional to 394.88, 592.69 and 209.92 is: 315.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    394.88 : 592.69 = 209.92 : x
  2. Step 2: Convert to fraction form
    394.88/592.69 = 209.92/x
  3. Step 3: Cross multiply
    394.88x = 592.69 × 209.92
  4. Step 4: Simplify right side
    394.88x = 124,417.48
  5. Step 5: Solve for x
    x = 124,417.48/394.88
  6. Step 6: Final answer
    x = 315.08

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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.