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Finding the Third Proportional to 147,156 and 319,920

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Solution

The third proportional to 147,156 and 319,920 is: 695,512.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,156 : 319,920 = 319,920 : x
  2. Step 2: Convert to fraction form
    147,156/319,920 = 319,920/x
  3. Step 3: Cross multiply
    147,156x = 319,920 × 319,920
  4. Step 4: Simplify right side
    147,156x = 102,348,806,400
  5. Step 5: Solve for x
    x = 102,348,806,400/147,156
  6. Step 6: Final answer
    x = 695,512.29

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.