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Finding the Fourth Proportional to 256,955.49, 354,588.71 and 143,778.33

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Solution

The fourth proportional to 256,955.49, 354,588.71 and 143,778.33 is: 198,408.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,955.49 : 354,588.71 = 143,778.33 : x
  2. Step 2: Convert to fraction form
    256,955.49/354,588.71 = 143,778.33/x
  3. Step 3: Cross multiply
    256,955.49x = 354,588.71 × 143,778.33
  4. Step 4: Simplify right side
    256,955.49x = 50,982,171,841.76
  5. Step 5: Solve for x
    x = 50,982,171,841.76/256,955.49
  6. Step 6: Final answer
    x = 198,408.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.