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Finding the Fourth Proportional to 667,310.90, 920,889.88 and 361,387.76

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Solution

The fourth proportional to 667,310.90, 920,889.88 and 361,387.76 is: 498,715.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,310.90 : 920,889.88 = 361,387.76 : x
  2. Step 2: Convert to fraction form
    667,310.90/920,889.88 = 361,387.76/x
  3. Step 3: Cross multiply
    667,310.90x = 920,889.88 × 361,387.76
  4. Step 4: Simplify right side
    667,310.90x = 332,798,330,939.87
  5. Step 5: Solve for x
    x = 332,798,330,939.87/667,310.90
  6. Step 6: Final answer
    x = 498,715.56

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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.