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Finding the Third Proportional to 156,970 and 339,840

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Solution

The third proportional to 156,970 and 339,840 is: 735,753.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,970 : 339,840 = 339,840 : x
  2. Step 2: Convert to fraction form
    156,970/339,840 = 339,840/x
  3. Step 3: Cross multiply
    156,970x = 339,840 × 339,840
  4. Step 4: Simplify right side
    156,970x = 115,491,225,600
  5. Step 5: Solve for x
    x = 115,491,225,600/156,970
  6. Step 6: Final answer
    x = 735,753.49

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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.