Home / 378,204.46-521,921.10-208,438.54

Finding the Fourth Proportional to 378,204.46, 521,921.10 and 208,438.54

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Solution

The fourth proportional to 378,204.46, 521,921.10 and 208,438.54 is: 287,644.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,204.46 : 521,921.10 = 208,438.54 : x
  2. Step 2: Convert to fraction form
    378,204.46/521,921.10 = 208,438.54/x
  3. Step 3: Cross multiply
    378,204.46x = 521,921.10 × 208,438.54
  4. Step 4: Simplify right side
    378,204.46x = 108,788,472,079.19
  5. Step 5: Solve for x
    x = 108,788,472,079.19/378,204.46
  6. Step 6: Final answer
    x = 287,644.60

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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.