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Finding the Fourth Proportional to 667,022.36, 920,483.86 and 361,091.88

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Solution

The fourth proportional to 667,022.36, 920,483.86 and 361,091.88 is: 498,303.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,022.36 : 920,483.86 = 361,091.88 : x
  2. Step 2: Convert to fraction form
    667,022.36/920,483.86 = 361,091.88/x
  3. Step 3: Cross multiply
    667,022.36x = 920,483.86 × 361,091.88
  4. Step 4: Simplify right side
    667,022.36x = 332,379,247,517.06
  5. Step 5: Solve for x
    x = 332,379,247,517.06/667,022.36
  6. Step 6: Final answer
    x = 498,303.01

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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.