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Finding the Fourth Proportional to 506.97, 699.43 and 388.97

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Solution

The fourth proportional to 506.97, 699.43 and 388.97 is: 536.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    506.97 : 699.43 = 388.97 : x
  2. Step 2: Convert to fraction form
    506.97/699.43 = 388.97/x
  3. Step 3: Cross multiply
    506.97x = 699.43 × 388.97
  4. Step 4: Simplify right side
    506.97x = 272,051.85
  5. Step 5: Solve for x
    x = 272,051.85/506.97
  6. Step 6: Final answer
    x = 536.62

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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.