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Finding the Fourth Proportional to 256,859.37, 354,446.69 and 143,660.25

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Solution

The fourth proportional to 256,859.37, 354,446.69 and 143,660.25 is: 198,240.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,859.37 : 354,446.69 = 143,660.25 : x
  2. Step 2: Convert to fraction form
    256,859.37/354,446.69 = 143,660.25/x
  3. Step 3: Cross multiply
    256,859.37x = 354,446.69 × 143,660.25
  4. Step 4: Simplify right side
    256,859.37x = 50,919,899,378.77
  5. Step 5: Solve for x
    x = 50,919,899,378.77/256,859.37
  6. Step 6: Final answer
    x = 198,240.38

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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.