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Finding the Fourth Proportional to 667,011.30, 920,475.36 and 361,087.44

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Solution

The fourth proportional to 667,011.30, 920,475.36 and 361,087.44 is: 498,300.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,011.30 : 920,475.36 = 361,087.44 : x
  2. Step 2: Convert to fraction form
    667,011.30/920,475.36 = 361,087.44/x
  3. Step 3: Cross multiply
    667,011.30x = 920,475.36 × 361,087.44
  4. Step 4: Simplify right side
    667,011.30x = 332,372,091,325.48
  5. Step 5: Solve for x
    x = 332,372,091,325.48/667,011.30
  6. Step 6: Final answer
    x = 498,300.54

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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.