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Finding the Fourth Proportional to 667,260.73, 920,783.31 and 395,353.66

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Solution

The fourth proportional to 667,260.73, 920,783.31 and 395,353.66 is: 545,566.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,260.73 : 920,783.31 = 395,353.66 : x
  2. Step 2: Convert to fraction form
    667,260.73/920,783.31 = 395,353.66/x
  3. Step 3: Cross multiply
    667,260.73x = 920,783.31 × 395,353.66
  4. Step 4: Simplify right side
    667,260.73x = 364,035,047,276.34
  5. Step 5: Solve for x
    x = 364,035,047,276.34/667,260.73
  6. Step 6: Final answer
    x = 545,566.42

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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.