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Finding the Fourth Proportional to 667,278.94, 920,845.41 and 361,357.72

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Solution

The fourth proportional to 667,278.94, 920,845.41 and 361,357.72 is: 498,673.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,278.94 : 920,845.41 = 361,357.72 : x
  2. Step 2: Convert to fraction form
    667,278.94/920,845.41 = 361,357.72/x
  3. Step 3: Cross multiply
    667,278.94x = 920,845.41 × 361,357.72
  4. Step 4: Simplify right side
    667,278.94x = 332,754,597,830.07
  5. Step 5: Solve for x
    x = 332,754,597,830.07/667,278.94
  6. Step 6: Final answer
    x = 498,673.91

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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.