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Finding the Fourth Proportional to 479,372.30, 661,511.64 and 275,279.64

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Solution

The fourth proportional to 479,372.30, 661,511.64 and 275,279.64 is: 379,873.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,372.30 : 661,511.64 = 275,279.64 : x
  2. Step 2: Convert to fraction form
    479,372.30/661,511.64 = 275,279.64/x
  3. Step 3: Cross multiply
    479,372.30x = 661,511.64 × 275,279.64
  4. Step 4: Simplify right side
    479,372.30x = 182,100,686,115.01
  5. Step 5: Solve for x
    x = 182,100,686,115.01/479,372.30
  6. Step 6: Final answer
    x = 379,873.19

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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.