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Finding the Third Proportional to 508.78 and 877.08

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Solution

The third proportional to 508.78 and 877.08 is: 1,511.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    508.78 : 877.08 = 877.08 : x
  2. Step 2: Convert to fraction form
    508.78/877.08 = 877.08/x
  3. Step 3: Cross multiply
    508.78x = 877.08 × 877.08
  4. Step 4: Simplify right side
    508.78x = 769,266.04
  5. Step 5: Solve for x
    x = 769,266.04/508.78
  6. Step 6: Final answer
    x = 1,511.98

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Why These Related Problems?

These problems maintain the same ratio (1.72) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.