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Finding the Fourth Proportional to 256,543.70, 385,276.35 and 248,249.30

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Solution

The fourth proportional to 256,543.70, 385,276.35 and 248,249.30 is: 372,819.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,543.70 : 385,276.35 = 248,249.30 : x
  2. Step 2: Convert to fraction form
    256,543.70/385,276.35 = 248,249.30/x
  3. Step 3: Cross multiply
    256,543.70x = 385,276.35 × 248,249.30
  4. Step 4: Simplify right side
    256,543.70x = 95,644,584,194.06
  5. Step 5: Solve for x
    x = 95,644,584,194.06/256,543.70
  6. Step 6: Final answer
    x = 372,819.85

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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.