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Finding the Fourth Proportional to 485,820.99, 669,924.27 and 418,067.73

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Solution

The fourth proportional to 485,820.99, 669,924.27 and 418,067.73 is: 576,495.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,820.99 : 669,924.27 = 418,067.73 : x
  2. Step 2: Convert to fraction form
    485,820.99/669,924.27 = 418,067.73/x
  3. Step 3: Cross multiply
    485,820.99x = 669,924.27 × 418,067.73
  4. Step 4: Simplify right side
    485,820.99x = 280,073,718,830.81
  5. Step 5: Solve for x
    x = 280,073,718,830.81/485,820.99
  6. Step 6: Final answer
    x = 576,495.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.