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Finding the Fourth Proportional to 298,213.10, 447,028.05 and 266,720.30

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Solution

The fourth proportional to 298,213.10, 447,028.05 and 266,720.30 is: 399,819.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,213.10 : 447,028.05 = 266,720.30 : x
  2. Step 2: Convert to fraction form
    298,213.10/447,028.05 = 266,720.30/x
  3. Step 3: Cross multiply
    298,213.10x = 447,028.05 × 266,720.30
  4. Step 4: Simplify right side
    298,213.10x = 119,231,455,604.42
  5. Step 5: Solve for x
    x = 119,231,455,604.42/298,213.10
  6. Step 6: Final answer
    x = 399,819.64

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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.