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Finding the Fourth Proportional to 665,176.31, 917,944.14 and 378,696.39

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Solution

The fourth proportional to 665,176.31, 917,944.14 and 378,696.39 is: 522,601.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,176.31 : 917,944.14 = 378,696.39 : x
  2. Step 2: Convert to fraction form
    665,176.31/917,944.14 = 378,696.39/x
  3. Step 3: Cross multiply
    665,176.31x = 917,944.14 × 378,696.39
  4. Step 4: Simplify right side
    665,176.31x = 347,622,132,039.66
  5. Step 5: Solve for x
    x = 347,622,132,039.66/665,176.31
  6. Step 6: Final answer
    x = 522,601.49

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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.