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Finding the Fourth Proportional to 479,146.68, 661,221.18 and 275,211

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Solution

The fourth proportional to 479,146.68, 661,221.18 and 275,211 is: 379,790.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,146.68 : 661,221.18 = 275,211 : x
  2. Step 2: Convert to fraction form
    479,146.68/661,221.18 = 275,211/x
  3. Step 3: Cross multiply
    479,146.68x = 661,221.18 × 275,211
  4. Step 4: Simplify right side
    479,146.68x = 181,975,342,168.98
  5. Step 5: Solve for x
    x = 181,975,342,168.98/479,146.68
  6. Step 6: Final answer
    x = 379,790.47

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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.