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Finding the Fourth Proportional to 611,091.67, 843,293.81 and 339,143.77

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Solution

The fourth proportional to 611,091.67, 843,293.81 and 339,143.77 is: 468,011.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,091.67 : 843,293.81 = 339,143.77 : x
  2. Step 2: Convert to fraction form
    611,091.67/843,293.81 = 339,143.77/x
  3. Step 3: Cross multiply
    611,091.67x = 843,293.81 × 339,143.77
  4. Step 4: Simplify right side
    611,091.67x = 285,997,841,941.06
  5. Step 5: Solve for x
    x = 285,997,841,941.06/611,091.67
  6. Step 6: Final answer
    x = 468,011.36

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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.