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Finding the Fourth Proportional to 256,895.10, 385,342.65 and 251,646.30

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Solution

The fourth proportional to 256,895.10, 385,342.65 and 251,646.30 is: 377,469.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,895.10 : 385,342.65 = 251,646.30 : x
  2. Step 2: Convert to fraction form
    256,895.10/385,342.65 = 251,646.30/x
  3. Step 3: Cross multiply
    256,895.10x = 385,342.65 × 251,646.30
  4. Step 4: Simplify right side
    256,895.10x = 96,970,052,104.70
  5. Step 5: Solve for x
    x = 96,970,052,104.70/256,895.10
  6. Step 6: Final answer
    x = 377,469.45

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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.