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Finding the Fourth Proportional to 376,813.30, 519,991.50 and 215,662.87

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Solution

The fourth proportional to 376,813.30, 519,991.50 and 215,662.87 is: 297,608.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    376,813.30 : 519,991.50 = 215,662.87 : x
  2. Step 2: Convert to fraction form
    376,813.30/519,991.50 = 215,662.87/x
  3. Step 3: Cross multiply
    376,813.30x = 519,991.50 × 215,662.87
  4. Step 4: Simplify right side
    376,813.30x = 112,142,859,265.61
  5. Step 5: Solve for x
    x = 112,142,859,265.61/376,813.30
  6. Step 6: Final answer
    x = 297,608.55

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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.