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Finding the Fourth Proportional to 666,070.25, 919,174.97 and 360,144.45

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Solution

The fourth proportional to 666,070.25, 919,174.97 and 360,144.45 is: 496,998.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,070.25 : 919,174.97 = 360,144.45 : x
  2. Step 2: Convert to fraction form
    666,070.25/919,174.97 = 360,144.45/x
  3. Step 3: Cross multiply
    666,070.25x = 919,174.97 × 360,144.45
  4. Step 4: Simplify right side
    666,070.25x = 331,035,764,924.78
  5. Step 5: Solve for x
    x = 331,035,764,924.78/666,070.25
  6. Step 6: Final answer
    x = 496,998.28

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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.