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Finding the Fourth Proportional to 225,390.48, 311,047.22 and 128,610.06

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Solution

The fourth proportional to 225,390.48, 311,047.22 and 128,610.06 is: 177,486.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,390.48 : 311,047.22 = 128,610.06 : x
  2. Step 2: Convert to fraction form
    225,390.48/311,047.22 = 128,610.06/x
  3. Step 3: Cross multiply
    225,390.48x = 311,047.22 × 128,610.06
  4. Step 4: Simplify right side
    225,390.48x = 40,003,801,627.03
  5. Step 5: Solve for x
    x = 40,003,801,627.03/225,390.48
  6. Step 6: Final answer
    x = 177,486.65

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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.