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Finding the Fourth Proportional to 574.69, 792.15 and 388.12

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Solution

The fourth proportional to 574.69, 792.15 and 388.12 is: 534.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    574.69 : 792.15 = 388.12 : x
  2. Step 2: Convert to fraction form
    574.69/792.15 = 388.12/x
  3. Step 3: Cross multiply
    574.69x = 792.15 × 388.12
  4. Step 4: Simplify right side
    574.69x = 307,450.25
  5. Step 5: Solve for x
    x = 307,450.25/574.69
  6. Step 6: Final answer
    x = 534.98

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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.