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Finding the Fourth Proportional to 303,658.20, 455,400.22 and 90,417.20

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Solution

The fourth proportional to 303,658.20, 455,400.22 and 90,417.20 is: 135,599.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,658.20 : 455,400.22 = 90,417.20 : x
  2. Step 2: Convert to fraction form
    303,658.20/455,400.22 = 90,417.20/x
  3. Step 3: Cross multiply
    303,658.20x = 455,400.22 × 90,417.20
  4. Step 4: Simplify right side
    303,658.20x = 41,176,012,771.78
  5. Step 5: Solve for x
    x = 41,176,012,771.78/303,658.20
  6. Step 6: Final answer
    x = 135,599.87

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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.