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Finding the Fourth Proportional to 667,155.80, 920,668.10 and 361,226.92

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Solution

The fourth proportional to 667,155.80, 920,668.10 and 361,226.92 is: 498,489.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,155.80 : 920,668.10 = 361,226.92 : x
  2. Step 2: Convert to fraction form
    667,155.80/920,668.10 = 361,226.92/x
  3. Step 3: Cross multiply
    667,155.80x = 920,668.10 × 361,226.92
  4. Step 4: Simplify right side
    667,155.80x = 332,570,102,105.25
  5. Step 5: Solve for x
    x = 332,570,102,105.25/667,155.80
  6. Step 6: Final answer
    x = 498,489.41

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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.