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Finding the Fourth Proportional to 666,998.55, 920,456.97 and 361,074.85

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Solution

The fourth proportional to 666,998.55, 920,456.97 and 361,074.85 is: 498,282.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,998.55 : 920,456.97 = 361,074.85 : x
  2. Step 2: Convert to fraction form
    666,998.55/920,456.97 = 361,074.85/x
  3. Step 3: Cross multiply
    666,998.55x = 920,456.97 × 361,074.85
  4. Step 4: Simplify right side
    666,998.55x = 332,353,860,568.83
  5. Step 5: Solve for x
    x = 332,353,860,568.83/666,998.55
  6. Step 6: Final answer
    x = 498,282.73

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1.5x scale

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.