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Finding the Third Proportional to 239.70 and 508.15

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Solution

The third proportional to 239.70 and 508.15 is: 1,077.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.70 : 508.15 = 508.15 : x
  2. Step 2: Convert to fraction form
    239.70/508.15 = 508.15/x
  3. Step 3: Cross multiply
    239.70x = 508.15 × 508.15
  4. Step 4: Simplify right side
    239.70x = 258,214.83
  5. Step 5: Solve for x
    x = 258,214.83/239.70
  6. Step 6: Final answer
    x = 1,077.26

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Why These Related Problems?

These problems maintain the same ratio (2.12) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.