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Finding the Fourth Proportional to 667,364.56, 921,019.80 and 377,029.45

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Solution

The fourth proportional to 667,364.56, 921,019.80 and 377,029.45 is: 520,332.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,364.56 : 921,019.80 = 377,029.45 : x
  2. Step 2: Convert to fraction form
    667,364.56/921,019.80 = 377,029.45/x
  3. Step 3: Cross multiply
    667,364.56x = 921,019.80 × 377,029.45
  4. Step 4: Simplify right side
    667,364.56x = 347,251,591,212.33
  5. Step 5: Solve for x
    x = 347,251,591,212.33/667,364.56
  6. Step 6: Final answer
    x = 520,332.68

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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.