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Finding the Third Proportional to 253,740 and 395,136

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Solution

The third proportional to 253,740 and 395,136 is: 615,324.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,740 : 395,136 = 395,136 : x
  2. Step 2: Convert to fraction form
    253,740/395,136 = 395,136/x
  3. Step 3: Cross multiply
    253,740x = 395,136 × 395,136
  4. Step 4: Simplify right side
    253,740x = 156,132,458,496
  5. Step 5: Solve for x
    x = 156,132,458,496/253,740
  6. Step 6: Final answer
    x = 615,324.58

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Why These Related Problems?

These problems maintain the same ratio (1.56) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.