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Finding the Fourth Proportional to 667,355.66, 920,945.50 and 361,424.94

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Solution

The fourth proportional to 667,355.66, 920,945.50 and 361,424.94 is: 498,763.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    667,355.66 : 920,945.50 = 361,424.94 : x
  2. Step 2: Convert to fraction form
    667,355.66/920,945.50 = 361,424.94/x
  3. Step 3: Cross multiply
    667,355.66x = 920,945.50 × 361,424.94
  4. Step 4: Simplify right side
    667,355.66x = 332,852,667,723.66
  5. Step 5: Solve for x
    x = 332,852,667,723.66/667,355.66
  6. Step 6: Final answer
    x = 498,763.54

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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.