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Finding the Fourth Proportional to 667,389.96, 920,999.10 and 361,466.94

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Solution

The fourth proportional to 667,389.96, 920,999.10 and 361,466.94 is: 498,824.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,389.96 : 920,999.10 = 361,466.94 : x
  2. Step 2: Convert to fraction form
    667,389.96/920,999.10 = 361,466.94/x
  3. Step 3: Cross multiply
    667,389.96x = 920,999.10 × 361,466.94
  4. Step 4: Simplify right side
    667,389.96x = 332,910,726,419.75
  5. Step 5: Solve for x
    x = 332,910,726,419.75/667,389.96
  6. Step 6: Final answer
    x = 498,824.89

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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.