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Finding the Third Proportional to 256,060.50 and 395,638.50

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Solution

The third proportional to 256,060.50 and 395,638.50 is: 611,300.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,060.50 : 395,638.50 = 395,638.50 : x
  2. Step 2: Convert to fraction form
    256,060.50/395,638.50 = 395,638.50/x
  3. Step 3: Cross multiply
    256,060.50x = 395,638.50 × 395,638.50
  4. Step 4: Simplify right side
    256,060.50x = 156,529,822,682.25
  5. Step 5: Solve for x
    x = 156,529,822,682.25/256,060.50
  6. Step 6: Final answer
    x = 611,300.15

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Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.