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Finding the Fourth Proportional to 611,138.88, 843,380.64 and 339,224.28

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Solution

The fourth proportional to 611,138.88, 843,380.64 and 339,224.28 is: 468,134.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,138.88 : 843,380.64 = 339,224.28 : x
  2. Step 2: Convert to fraction form
    611,138.88/843,380.64 = 339,224.28/x
  3. Step 3: Cross multiply
    611,138.88x = 843,380.64 × 339,224.28
  4. Step 4: Simplify right side
    611,138.88x = 286,095,190,369.94
  5. Step 5: Solve for x
    x = 286,095,190,369.94/611,138.88
  6. Step 6: Final answer
    x = 468,134.49

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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.