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Finding the Fourth Proportional to 666,107.80, 919,173.24 and 375,703.36

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Solution

The fourth proportional to 666,107.80, 919,173.24 and 375,703.36 is: 518,439.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,107.80 : 919,173.24 = 375,703.36 : x
  2. Step 2: Convert to fraction form
    666,107.80/919,173.24 = 375,703.36/x
  3. Step 3: Cross multiply
    666,107.80x = 919,173.24 × 375,703.36
  4. Step 4: Simplify right side
    666,107.80x = 345,336,472,392.15
  5. Step 5: Solve for x
    x = 345,336,472,392.15/666,107.80
  6. Step 6: Final answer
    x = 518,439.32

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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.