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Finding the Fourth Proportional to 666,394.20, 919,600.32 and 376,097.28

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Solution

The fourth proportional to 666,394.20, 919,600.32 and 376,097.28 is: 519,000.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,394.20 : 919,600.32 = 376,097.28 : x
  2. Step 2: Convert to fraction form
    666,394.20/919,600.32 = 376,097.28/x
  3. Step 3: Cross multiply
    666,394.20x = 919,600.32 × 376,097.28
  4. Step 4: Simplify right side
    666,394.20x = 345,859,179,039.13
  5. Step 5: Solve for x
    x = 345,859,179,039.13/666,394.20
  6. Step 6: Final answer
    x = 519,000.88

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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.