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Finding the Fourth Proportional to 479,309.10, 661,505.13 and 275,359.64

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Solution

The fourth proportional to 479,309.10, 661,505.13 and 275,359.64 is: 380,029.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,309.10 : 661,505.13 = 275,359.64 : x
  2. Step 2: Convert to fraction form
    479,309.10/661,505.13 = 275,359.64/x
  3. Step 3: Cross multiply
    479,309.10x = 661,505.13 × 275,359.64
  4. Step 4: Simplify right side
    479,309.10x = 182,151,811,147.43
  5. Step 5: Solve for x
    x = 182,151,811,147.43/479,309.10
  6. Step 6: Final answer
    x = 380,029.95

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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.