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Finding the Fourth Proportional to 666,999.66, 920,458.54 and 361,074.54

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Solution

The fourth proportional to 666,999.66, 920,458.54 and 361,074.54 is: 498,282.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,999.66 : 920,458.54 = 361,074.54 : x
  2. Step 2: Convert to fraction form
    666,999.66/920,458.54 = 361,074.54/x
  3. Step 3: Cross multiply
    666,999.66x = 920,458.54 × 361,074.54
  4. Step 4: Simplify right side
    666,999.66x = 332,354,143,919.57
  5. Step 5: Solve for x
    x = 332,354,143,919.57/666,999.66
  6. Step 6: Final answer
    x = 498,282.33

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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.