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Finding the Fourth Proportional to 378,354.72, 522,104.22 and 217,187.40

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Solution

The fourth proportional to 378,354.72, 522,104.22 and 217,187.40 is: 299,704.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,354.72 : 522,104.22 = 217,187.40 : x
  2. Step 2: Convert to fraction form
    378,354.72/522,104.22 = 217,187.40/x
  3. Step 3: Cross multiply
    378,354.72x = 522,104.22 × 217,187.40
  4. Step 4: Simplify right side
    378,354.72x = 113,394,458,070.83
  5. Step 5: Solve for x
    x = 113,394,458,070.83/378,354.72
  6. Step 6: Final answer
    x = 299,704.09

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1.5x scale

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.