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Finding the Fourth Proportional to 574.40, 792.97 and 388.87

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Solution

The fourth proportional to 574.40, 792.97 and 388.87 is: 536.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    574.40 : 792.97 = 388.87 : x
  2. Step 2: Convert to fraction form
    574.40/792.97 = 388.87/x
  3. Step 3: Cross multiply
    574.40x = 792.97 × 388.87
  4. Step 4: Simplify right side
    574.40x = 308,359.29
  5. Step 5: Solve for x
    x = 308,359.29/574.40
  6. Step 6: Final answer
    x = 536.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.