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Finding the Fourth Proportional to 506.74, 699.38 and 310.36

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Solution

The fourth proportional to 506.74, 699.38 and 310.36 is: 428.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    506.74 : 699.38 = 310.36 : x
  2. Step 2: Convert to fraction form
    506.74/699.38 = 310.36/x
  3. Step 3: Cross multiply
    506.74x = 699.38 × 310.36
  4. Step 4: Simplify right side
    506.74x = 217,058.03
  5. Step 5: Solve for x
    x = 217,058.03/506.74
  6. Step 6: Final answer
    x = 428.34

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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.