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Finding the Third Proportional to 508.78 and 672.05

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Solution

The third proportional to 508.78 and 672.05 is: 887.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    508.78 : 672.05 = 672.05 : x
  2. Step 2: Convert to fraction form
    508.78/672.05 = 672.05/x
  3. Step 3: Cross multiply
    508.78x = 672.05 × 672.05
  4. Step 4: Simplify right side
    508.78x = 451,647.00
  5. Step 5: Solve for x
    x = 451,647.00/508.78
  6. Step 6: Final answer
    x = 887.70

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These problems maintain the same ratio (1.32) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.