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Finding the Fourth Proportional to 448,138.60, 672,207.90 and 445,028.20

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Solution

The fourth proportional to 448,138.60, 672,207.90 and 445,028.20 is: 667,542.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,138.60 : 672,207.90 = 445,028.20 : x
  2. Step 2: Convert to fraction form
    448,138.60/672,207.90 = 445,028.20/x
  3. Step 3: Cross multiply
    448,138.60x = 672,207.90 × 445,028.20
  4. Step 4: Simplify right side
    448,138.60x = 299,151,471,762.78
  5. Step 5: Solve for x
    x = 299,151,471,762.78/448,138.60
  6. Step 6: Final answer
    x = 667,542.30

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Similar ratio
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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.