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Finding the Fourth Proportional to 667,076.71, 920,566.45 and 361,153.30

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Solution

The fourth proportional to 667,076.71, 920,566.45 and 361,153.30 is: 498,391.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,076.71 : 920,566.45 = 361,153.30 : x
  2. Step 2: Convert to fraction form
    667,076.71/920,566.45 = 361,153.30/x
  3. Step 3: Cross multiply
    667,076.71x = 920,566.45 × 361,153.30
  4. Step 4: Simplify right side
    667,076.71x = 332,465,611,286.79
  5. Step 5: Solve for x
    x = 332,465,611,286.79/667,076.71
  6. Step 6: Final answer
    x = 498,391.87

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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.