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Finding the Fourth Proportional to 663,640.72, 915,901.97 and 377,203.88

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Solution

The fourth proportional to 663,640.72, 915,901.97 and 377,203.88 is: 520,585.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,640.72 : 915,901.97 = 377,203.88 : x
  2. Step 2: Convert to fraction form
    663,640.72/915,901.97 = 377,203.88/x
  3. Step 3: Cross multiply
    663,640.72x = 915,901.97 × 377,203.88
  4. Step 4: Simplify right side
    663,640.72x = 345,481,776,783.64
  5. Step 5: Solve for x
    x = 345,481,776,783.64/663,640.72
  6. Step 6: Final answer
    x = 520,585.56

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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.