Home / 378,788.28-522,757.32-217,699.52

Finding the Fourth Proportional to 378,788.28, 522,757.32 and 217,699.52

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Solution

The fourth proportional to 378,788.28, 522,757.32 and 217,699.52 is: 300,442.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,788.28 : 522,757.32 = 217,699.52 : x
  2. Step 2: Convert to fraction form
    378,788.28/522,757.32 = 217,699.52/x
  3. Step 3: Cross multiply
    378,788.28x = 522,757.32 × 217,699.52
  4. Step 4: Simplify right side
    378,788.28x = 113,804,017,640.49
  5. Step 5: Solve for x
    x = 113,804,017,640.49/378,788.28
  6. Step 6: Final answer
    x = 300,442.29

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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.