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Finding the Fourth Proportional to 667,090.78, 920,585.46 and 361,167.10

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Solution

The fourth proportional to 667,090.78, 920,585.46 and 361,167.10 is: 498,410.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,090.78 : 920,585.46 = 361,167.10 : x
  2. Step 2: Convert to fraction form
    667,090.78/920,585.46 = 361,167.10/x
  3. Step 3: Cross multiply
    667,090.78x = 920,585.46 × 361,167.10
  4. Step 4: Simplify right side
    667,090.78x = 332,485,180,890.37
  5. Step 5: Solve for x
    x = 332,485,180,890.37/667,090.78
  6. Step 6: Final answer
    x = 498,410.70

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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.