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Finding the Fourth Proportional to 479,116.76, 661,211.34 and 275,231.48

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Solution

The fourth proportional to 479,116.76, 661,211.34 and 275,231.48 is: 379,836.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,116.76 : 661,211.34 = 275,231.48 : x
  2. Step 2: Convert to fraction form
    479,116.76/661,211.34 = 275,231.48/x
  3. Step 3: Cross multiply
    479,116.76x = 661,211.34 × 275,231.48
  4. Step 4: Simplify right side
    479,116.76x = 181,986,175,700.98
  5. Step 5: Solve for x
    x = 181,986,175,700.98/479,116.76
  6. Step 6: Final answer
    x = 379,836.80

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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.