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Finding the Fourth Proportional to 256,668.96, 354,204.36 and 143,489.28

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Solution

The fourth proportional to 256,668.96, 354,204.36 and 143,489.28 is: 198,015.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,668.96 : 354,204.36 = 143,489.28 : x
  2. Step 2: Convert to fraction form
    256,668.96/354,204.36 = 143,489.28/x
  3. Step 3: Cross multiply
    256,668.96x = 354,204.36 × 143,489.28
  4. Step 4: Simplify right side
    256,668.96x = 50,824,528,589.26
  5. Step 5: Solve for x
    x = 50,824,528,589.26/256,668.96
  6. Step 6: Final answer
    x = 198,015.87

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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.