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Finding the Fourth Proportional to 256,221.20, 384,331.80 and 252,284.60

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Solution

The fourth proportional to 256,221.20, 384,331.80 and 252,284.60 is: 378,426.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,221.20 : 384,331.80 = 252,284.60 : x
  2. Step 2: Convert to fraction form
    256,221.20/384,331.80 = 252,284.60/x
  3. Step 3: Cross multiply
    256,221.20x = 384,331.80 × 252,284.60
  4. Step 4: Simplify right side
    256,221.20x = 96,960,994,430.28
  5. Step 5: Solve for x
    x = 96,960,994,430.28/256,221.20
  6. Step 6: Final answer
    x = 378,426.90

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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.