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Finding the Fourth Proportional to 256,864.44, 354,486.70 and 143,680.44

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Solution

The fourth proportional to 256,864.44, 354,486.70 and 143,680.44 is: 198,286.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,864.44 : 354,486.70 = 143,680.44 : x
  2. Step 2: Convert to fraction form
    256,864.44/354,486.70 = 143,680.44/x
  3. Step 3: Cross multiply
    256,864.44x = 354,486.70 × 143,680.44
  4. Step 4: Simplify right side
    256,864.44x = 50,932,805,030.15
  5. Step 5: Solve for x
    x = 50,932,805,030.15/256,864.44
  6. Step 6: Final answer
    x = 198,286.71

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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.