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Finding the Fourth Proportional to 256,272.30, 384,408.45 and 131,856.30

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Solution

The fourth proportional to 256,272.30, 384,408.45 and 131,856.30 is: 197,784.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,272.30 : 384,408.45 = 131,856.30 : x
  2. Step 2: Convert to fraction form
    256,272.30/384,408.45 = 131,856.30/x
  3. Step 3: Cross multiply
    256,272.30x = 384,408.45 × 131,856.30
  4. Step 4: Simplify right side
    256,272.30x = 50,686,675,905.74
  5. Step 5: Solve for x
    x = 50,686,675,905.74/256,272.30
  6. Step 6: Final answer
    x = 197,784.45

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.