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Finding the Fourth Proportional to 303,660.20, 455,403.22 and 90,419.20

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Solution

The fourth proportional to 303,660.20, 455,403.22 and 90,419.20 is: 135,602.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,660.20 : 455,403.22 = 90,419.20 : x
  2. Step 2: Convert to fraction form
    303,660.20/455,403.22 = 90,419.20/x
  3. Step 3: Cross multiply
    303,660.20x = 455,403.22 × 90,419.20
  4. Step 4: Simplify right side
    303,660.20x = 41,177,194,829.82
  5. Step 5: Solve for x
    x = 41,177,194,829.82/303,660.20
  6. Step 6: Final answer
    x = 135,602.87

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.