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Finding the Fourth Proportional to 667,711.48, 921,480.82 and 377,315.64

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Solution

The fourth proportional to 667,711.48, 921,480.82 and 377,315.64 is: 520,717.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,711.48 : 921,480.82 = 377,315.64 : x
  2. Step 2: Convert to fraction form
    667,711.48/921,480.82 = 377,315.64/x
  3. Step 3: Cross multiply
    667,711.48x = 921,480.82 × 377,315.64
  4. Step 4: Simplify right side
    667,711.48x = 347,689,125,346.03
  5. Step 5: Solve for x
    x = 347,689,125,346.03/667,711.48
  6. Step 6: Final answer
    x = 520,717.61

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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.