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Finding the Fourth Proportional to 303,659.20, 455,401.72 and 90,418.20

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Solution

The fourth proportional to 303,659.20, 455,401.72 and 90,418.20 is: 135,601.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,659.20 : 455,401.72 = 90,418.20 : x
  2. Step 2: Convert to fraction form
    303,659.20/455,401.72 = 90,418.20/x
  3. Step 3: Cross multiply
    303,659.20x = 455,401.72 × 90,418.20
  4. Step 4: Simplify right side
    303,659.20x = 41,176,603,799.30
  5. Step 5: Solve for x
    x = 41,176,603,799.30/303,659.20
  6. Step 6: Final answer
    x = 135,601.37

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1.5x scale

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.