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Finding the Fourth Proportional to 663,309.64, 915,370.34 and 376,845.44

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Solution

The fourth proportional to 663,309.64, 915,370.34 and 376,845.44 is: 520,048.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,309.64 : 915,370.34 = 376,845.44 : x
  2. Step 2: Convert to fraction form
    663,309.64/915,370.34 = 376,845.44/x
  3. Step 3: Cross multiply
    663,309.64x = 915,370.34 × 376,845.44
  4. Step 4: Simplify right side
    663,309.64x = 344,953,138,540.25
  5. Step 5: Solve for x
    x = 344,953,138,540.25/663,309.64
  6. Step 6: Final answer
    x = 520,048.43

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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.