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Finding the Fourth Proportional to 256,516.20, 385,235.10 and 248,221.80

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Solution

The fourth proportional to 256,516.20, 385,235.10 and 248,221.80 is: 372,778.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,516.20 : 385,235.10 = 248,221.80 : x
  2. Step 2: Convert to fraction form
    256,516.20/385,235.10 = 248,221.80/x
  3. Step 3: Cross multiply
    256,516.20x = 385,235.10 × 248,221.80
  4. Step 4: Simplify right side
    256,516.20x = 95,623,749,945.18
  5. Step 5: Solve for x
    x = 95,623,749,945.18/256,516.20
  6. Step 6: Final answer
    x = 372,778.60

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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.