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Finding the Fourth Proportional to 667,320.72, 920,914.56 and 365,495.28

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Solution

The fourth proportional to 667,320.72, 920,914.56 and 365,495.28 is: 504,390.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,320.72 : 920,914.56 = 365,495.28 : x
  2. Step 2: Convert to fraction form
    667,320.72/920,914.56 = 365,495.28/x
  3. Step 3: Cross multiply
    667,320.72x = 920,914.56 × 365,495.28
  4. Step 4: Simplify right side
    667,320.72x = 336,589,924,963.28
  5. Step 5: Solve for x
    x = 336,589,924,963.28/667,320.72
  6. Step 6: Final answer
    x = 504,390.04

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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.