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Finding the Fourth Proportional to 303,286.78, 455,024.56 and 90,055.80

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Solution

The fourth proportional to 303,286.78, 455,024.56 and 90,055.80 is: 135,111.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,286.78 : 455,024.56 = 90,055.80 : x
  2. Step 2: Convert to fraction form
    303,286.78/455,024.56 = 90,055.80/x
  3. Step 3: Cross multiply
    303,286.78x = 455,024.56 × 90,055.80
  4. Step 4: Simplify right side
    303,286.78x = 40,977,600,460.88
  5. Step 5: Solve for x
    x = 40,977,600,460.88/303,286.78
  6. Step 6: Final answer
    x = 135,111.73

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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.