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Finding the Fourth Proportional to 479,211.68, 661,289.87 and 275,118.96

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Solution

The fourth proportional to 479,211.68, 661,289.87 and 275,118.96 is: 379,651.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,211.68 : 661,289.87 = 275,118.96 : x
  2. Step 2: Convert to fraction form
    479,211.68/661,289.87 = 275,118.96/x
  3. Step 3: Cross multiply
    479,211.68x = 661,289.87 × 275,118.96
  4. Step 4: Simplify right side
    479,211.68x = 181,933,381,980.73
  5. Step 5: Solve for x
    x = 181,933,381,980.73/479,211.68
  6. Step 6: Final answer
    x = 379,651.39

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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.