Home / 378,948.21-522,930.15-215,589.33

Finding the Fourth Proportional to 378,948.21, 522,930.15 and 215,589.33

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Solution

The fourth proportional to 378,948.21, 522,930.15 and 215,589.33 is: 297,502.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,948.21 : 522,930.15 = 215,589.33 : x
  2. Step 2: Convert to fraction form
    378,948.21/522,930.15 = 215,589.33/x
  3. Step 3: Cross multiply
    378,948.21x = 522,930.15 × 215,589.33
  4. Step 4: Simplify right side
    378,948.21x = 112,738,160,675.30
  5. Step 5: Solve for x
    x = 112,738,160,675.30/378,948.21
  6. Step 6: Final answer
    x = 297,502.82

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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.