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Finding the Fourth Proportional to 665,198.73, 917,978.31 and 363,392.73

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Solution

The fourth proportional to 665,198.73, 917,978.31 and 363,392.73 is: 501,484.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,198.73 : 917,978.31 = 363,392.73 : x
  2. Step 2: Convert to fraction form
    665,198.73/917,978.31 = 363,392.73/x
  3. Step 3: Cross multiply
    665,198.73x = 917,978.31 × 363,392.73
  4. Step 4: Simplify right side
    665,198.73x = 333,586,644,151.69
  5. Step 5: Solve for x
    x = 333,586,644,151.69/665,198.73
  6. Step 6: Final answer
    x = 501,484.19

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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.