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Finding the Fourth Proportional to 378,370.62, 521,608.72 and 297,657.86

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Solution

The fourth proportional to 378,370.62, 521,608.72 and 297,657.86 is: 410,340.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,370.62 : 521,608.72 = 297,657.86 : x
  2. Step 2: Convert to fraction form
    378,370.62/521,608.72 = 297,657.86/x
  3. Step 3: Cross multiply
    378,370.62x = 521,608.72 × 297,657.86
  4. Step 4: Simplify right side
    378,370.62x = 155,260,935,352.54
  5. Step 5: Solve for x
    x = 155,260,935,352.54/378,370.62
  6. Step 6: Final answer
    x = 410,340.89

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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.