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Finding the Fourth Proportional to 225,496.56, 311,190.28 and 128,698.47

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Solution

The fourth proportional to 225,496.56, 311,190.28 and 128,698.47 is: 177,606.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,496.56 : 311,190.28 = 128,698.47 : x
  2. Step 2: Convert to fraction form
    225,496.56/311,190.28 = 128,698.47/x
  3. Step 3: Cross multiply
    225,496.56x = 311,190.28 × 128,698.47
  4. Step 4: Simplify right side
    225,496.56x = 40,049,712,914.87
  5. Step 5: Solve for x
    x = 40,049,712,914.87/225,496.56
  6. Step 6: Final answer
    x = 177,606.76

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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.