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Finding the Fourth Proportional to 663,640.22, 915,901.28 and 377,203.38

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Solution

The fourth proportional to 663,640.22, 915,901.28 and 377,203.38 is: 520,584.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,640.22 : 915,901.28 = 377,203.38 : x
  2. Step 2: Convert to fraction form
    663,640.22/915,901.28 = 377,203.38/x
  3. Step 3: Cross multiply
    663,640.22x = 915,901.28 × 377,203.38
  4. Step 4: Simplify right side
    663,640.22x = 345,481,058,562.33
  5. Step 5: Solve for x
    x = 345,481,058,562.33/663,640.22
  6. Step 6: Final answer
    x = 520,584.87

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1.5x scale

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.