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Finding the Fourth Proportional to 225,388.47, 311,044.46 and 128,608.07

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Solution

The fourth proportional to 225,388.47, 311,044.46 and 128,608.07 is: 177,483.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,388.47 : 311,044.46 = 128,608.07 : x
  2. Step 2: Convert to fraction form
    225,388.47/311,044.46 = 128,608.07/x
  3. Step 3: Cross multiply
    225,388.47x = 311,044.46 × 128,608.07
  4. Step 4: Simplify right side
    225,388.47x = 40,002,825,486.53
  5. Step 5: Solve for x
    x = 40,002,825,486.53/225,388.47
  6. Step 6: Final answer
    x = 177,483.90

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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.