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Finding the Third Proportional to 256,315.50 and 394,513.50

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Solution

The third proportional to 256,315.50 and 394,513.50 is: 607,223.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,315.50 : 394,513.50 = 394,513.50 : x
  2. Step 2: Convert to fraction form
    256,315.50/394,513.50 = 394,513.50/x
  3. Step 3: Cross multiply
    256,315.50x = 394,513.50 × 394,513.50
  4. Step 4: Simplify right side
    256,315.50x = 155,640,901,682.25
  5. Step 5: Solve for x
    x = 155,640,901,682.25/256,315.50
  6. Step 6: Final answer
    x = 607,223.92

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.