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Finding the Fourth Proportional to 256,620.32, 354,138.72 and 143,449.28

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Solution

The fourth proportional to 256,620.32, 354,138.72 and 143,449.28 is: 197,961.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,620.32 : 354,138.72 = 143,449.28 : x
  2. Step 2: Convert to fraction form
    256,620.32/354,138.72 = 143,449.28/x
  3. Step 3: Cross multiply
    256,620.32x = 354,138.72 × 143,449.28
  4. Step 4: Simplify right side
    256,620.32x = 50,800,944,404.12
  5. Step 5: Solve for x
    x = 50,800,944,404.12/256,620.32
  6. Step 6: Final answer
    x = 197,961.50

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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.