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Finding the Third Proportional to 156,438 and 342,279

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Solution

The third proportional to 156,438 and 342,279 is: 748,890.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,438 : 342,279 = 342,279 : x
  2. Step 2: Convert to fraction form
    156,438/342,279 = 342,279/x
  3. Step 3: Cross multiply
    156,438x = 342,279 × 342,279
  4. Step 4: Simplify right side
    156,438x = 117,154,913,841
  5. Step 5: Solve for x
    x = 117,154,913,841/156,438
  6. Step 6: Final answer
    x = 748,890.38

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.