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Finding the Fourth Proportional to 611,086.55, 843,286.75 and 339,138.63

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Solution

The fourth proportional to 611,086.55, 843,286.75 and 339,138.63 is: 468,004.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,086.55 : 843,286.75 = 339,138.63 : x
  2. Step 2: Convert to fraction form
    611,086.55/843,286.75 = 339,138.63/x
  3. Step 3: Cross multiply
    611,086.55x = 843,286.75 × 339,138.63
  4. Step 4: Simplify right side
    611,086.55x = 285,991,112,244.31
  5. Step 5: Solve for x
    x = 285,991,112,244.31/611,086.55
  6. Step 6: Final answer
    x = 468,004.27

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1.5x scale

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.