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Finding the Fourth Proportional to 666,517.56, 918,837.36 and 475,198.80

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Solution

The fourth proportional to 666,517.56, 918,837.36 and 475,198.80 is: 655,092.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,517.56 : 918,837.36 = 475,198.80 : x
  2. Step 2: Convert to fraction form
    666,517.56/918,837.36 = 475,198.80/x
  3. Step 3: Cross multiply
    666,517.56x = 918,837.36 × 475,198.80
  4. Step 4: Simplify right side
    666,517.56x = 436,630,410,867.17
  5. Step 5: Solve for x
    x = 436,630,410,867.17/666,517.56
  6. Step 6: Final answer
    x = 655,092.13

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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.