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Finding the Fourth Proportional to 611,936.72, 917,588.31 and 274,686.97

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Solution

The fourth proportional to 611,936.72, 917,588.31 and 274,686.97 is: 411,888.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,936.72 : 917,588.31 = 274,686.97 : x
  2. Step 2: Convert to fraction form
    611,936.72/917,588.31 = 274,686.97/x
  3. Step 3: Cross multiply
    611,936.72x = 917,588.31 × 274,686.97
  4. Step 4: Simplify right side
    611,936.72x = 252,049,555,489.86
  5. Step 5: Solve for x
    x = 252,049,555,489.86/611,936.72
  6. Step 6: Final answer
    x = 411,888.26

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.