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Finding the Fourth Proportional to 667,154.87, 920,674.15 and 361,231.46

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Solution

The fourth proportional to 667,154.87, 920,674.15 and 361,231.46 is: 498,499.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,154.87 : 920,674.15 = 361,231.46 : x
  2. Step 2: Convert to fraction form
    667,154.87/920,674.15 = 361,231.46/x
  3. Step 3: Cross multiply
    667,154.87x = 920,674.15 × 361,231.46
  4. Step 4: Simplify right side
    667,154.87x = 332,576,466,629.54
  5. Step 5: Solve for x
    x = 332,576,466,629.54/667,154.87
  6. Step 6: Final answer
    x = 498,499.65

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1.5x scale

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.