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Finding the Fourth Proportional to 256,318.90, 354,188.91 and 222,217.90

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Solution

The fourth proportional to 256,318.90, 354,188.91 and 222,217.90 is: 307,067.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,318.90 : 354,188.91 = 222,217.90 : x
  2. Step 2: Convert to fraction form
    256,318.90/354,188.91 = 222,217.90/x
  3. Step 3: Cross multiply
    256,318.90x = 354,188.91 × 222,217.90
  4. Step 4: Simplify right side
    256,318.90x = 78,707,115,783.49
  5. Step 5: Solve for x
    x = 78,707,115,783.49/256,318.90
  6. Step 6: Final answer
    x = 307,067.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.