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Finding the Fourth Proportional to 666,399.20, 919,607.22 and 376,102.28

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Solution

The fourth proportional to 666,399.20, 919,607.22 and 376,102.28 is: 519,007.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,399.20 : 919,607.22 = 376,102.28 : x
  2. Step 2: Convert to fraction form
    666,399.20/919,607.22 = 376,102.28/x
  3. Step 3: Cross multiply
    666,399.20x = 919,607.22 × 376,102.28
  4. Step 4: Simplify right side
    666,399.20x = 345,866,372,146.46
  5. Step 5: Solve for x
    x = 345,866,372,146.46/666,399.20
  6. Step 6: Final answer
    x = 519,007.78

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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.