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Finding the Fourth Proportional to 667,877.40, 921,723.30 and 413,310.60

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Solution

The fourth proportional to 667,877.40, 921,723.30 and 413,310.60 is: 570,401.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,877.40 : 921,723.30 = 413,310.60 : x
  2. Step 2: Convert to fraction form
    667,877.40/921,723.30 = 413,310.60/x
  3. Step 3: Cross multiply
    667,877.40x = 921,723.30 × 413,310.60
  4. Step 4: Simplify right side
    667,877.40x = 380,958,010,156.98
  5. Step 5: Solve for x
    x = 380,958,010,156.98/667,877.40
  6. Step 6: Final answer
    x = 570,401.11

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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.