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Finding the Third Proportional to 148,288.50 and 319,905

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Solution

The third proportional to 148,288.50 and 319,905 is: 690,135.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    148,288.50 : 319,905 = 319,905 : x
  2. Step 2: Convert to fraction form
    148,288.50/319,905 = 319,905/x
  3. Step 3: Cross multiply
    148,288.50x = 319,905 × 319,905
  4. Step 4: Simplify right side
    148,288.50x = 102,339,209,025
  5. Step 5: Solve for x
    x = 102,339,209,025/148,288.50
  6. Step 6: Final answer
    x = 690,135.84

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Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.