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Finding the Fourth Proportional to 256,512.76, 353,986.70 and 143,335.48

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Solution

The fourth proportional to 256,512.76, 353,986.70 and 143,335.48 is: 197,802.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,512.76 : 353,986.70 = 143,335.48 : x
  2. Step 2: Convert to fraction form
    256,512.76/353,986.70 = 143,335.48/x
  3. Step 3: Cross multiply
    256,512.76x = 353,986.70 × 143,335.48
  4. Step 4: Simplify right side
    256,512.76x = 50,738,853,558.12
  5. Step 5: Solve for x
    x = 50,738,853,558.12/256,512.76
  6. Step 6: Final answer
    x = 197,802.45

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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.