Home / 664,601.20-917,137.76-378,115.12

Finding the Fourth Proportional to 664,601.20, 917,137.76 and 378,115.12

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Solution

The fourth proportional to 664,601.20, 917,137.76 and 378,115.12 is: 521,792.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,601.20 : 917,137.76 = 378,115.12 : x
  2. Step 2: Convert to fraction form
    664,601.20/917,137.76 = 378,115.12/x
  3. Step 3: Cross multiply
    664,601.20x = 917,137.76 × 378,115.12
  4. Step 4: Simplify right side
    664,601.20x = 346,783,654,178.93
  5. Step 5: Solve for x
    x = 346,783,654,178.93/664,601.20
  6. Step 6: Final answer
    x = 521,792.10

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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.