Home / 378,919.60-522,906.20-209,153.68

Finding the Fourth Proportional to 378,919.60, 522,906.20 and 209,153.68

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Solution

The fourth proportional to 378,919.60, 522,906.20 and 209,153.68 is: 288,630.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,919.60 : 522,906.20 = 209,153.68 : x
  2. Step 2: Convert to fraction form
    378,919.60/522,906.20 = 209,153.68/x
  3. Step 3: Cross multiply
    378,919.60x = 522,906.20 × 209,153.68
  4. Step 4: Simplify right side
    378,919.60x = 109,367,756,024.82
  5. Step 5: Solve for x
    x = 109,367,756,024.82/378,919.60
  6. Step 6: Final answer
    x = 288,630.51

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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.