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Finding the Fourth Proportional to 574.97, 792.54 and 388.40

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Solution

The fourth proportional to 574.97, 792.54 and 388.40 is: 535.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    574.97 : 792.54 = 388.40 : x
  2. Step 2: Convert to fraction form
    574.97/792.54 = 388.40/x
  3. Step 3: Cross multiply
    574.97x = 792.54 × 388.40
  4. Step 4: Simplify right side
    574.97x = 307,824.52
  5. Step 5: Solve for x
    x = 307,824.52/574.97
  6. Step 6: Final answer
    x = 535.37

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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.