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Finding the Fourth Proportional to 663,605.70, 915,736.41 and 377,086.02

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Solution

The fourth proportional to 663,605.70, 915,736.41 and 377,086.02 is: 520,356.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,605.70 : 915,736.41 = 377,086.02 : x
  2. Step 2: Convert to fraction form
    663,605.70/915,736.41 = 377,086.02/x
  3. Step 3: Cross multiply
    663,605.70x = 915,736.41 × 377,086.02
  4. Step 4: Simplify right side
    663,605.70x = 345,311,398,215.99
  5. Step 5: Solve for x
    x = 345,311,398,215.99/663,605.70
  6. Step 6: Final answer
    x = 520,356.29

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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.