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Finding the Fourth Proportional to 667,236.45, 920,788.16 and 361,316.43

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Solution

The fourth proportional to 667,236.45, 920,788.16 and 361,316.43 is: 498,617.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,236.45 : 920,788.16 = 361,316.43 : x
  2. Step 2: Convert to fraction form
    667,236.45/920,788.16 = 361,316.43/x
  3. Step 3: Cross multiply
    667,236.45x = 920,788.16 × 361,316.43
  4. Step 4: Simplify right side
    667,236.45x = 332,695,888,950.89
  5. Step 5: Solve for x
    x = 332,695,888,950.89/667,236.45
  6. Step 6: Final answer
    x = 498,617.68

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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.