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Finding the Fourth Proportional to 667,023.96, 920,498.94 and 395,107.32

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Solution

The fourth proportional to 667,023.96, 920,498.94 and 395,107.32 is: 545,251.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,023.96 : 920,498.94 = 395,107.32 : x
  2. Step 2: Convert to fraction form
    667,023.96/920,498.94 = 395,107.32/x
  3. Step 3: Cross multiply
    667,023.96x = 920,498.94 × 395,107.32
  4. Step 4: Simplify right side
    667,023.96x = 363,695,869,246.24
  5. Step 5: Solve for x
    x = 363,695,869,246.24/667,023.96
  6. Step 6: Final answer
    x = 545,251.58

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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.