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Finding the Fourth Proportional to 422,005.16, 635,969.96 and 379,927.28

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Solution

The fourth proportional to 422,005.16, 635,969.96 and 379,927.28 is: 572,557.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,005.16 : 635,969.96 = 379,927.28 : x
  2. Step 2: Convert to fraction form
    422,005.16/635,969.96 = 379,927.28/x
  3. Step 3: Cross multiply
    422,005.16x = 635,969.96 × 379,927.28
  4. Step 4: Simplify right side
    422,005.16x = 241,622,337,064.51
  5. Step 5: Solve for x
    x = 241,622,337,064.51/422,005.16
  6. Step 6: Final answer
    x = 572,557.78

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.