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Finding the Fourth Proportional to 611,418.87, 843,716.93 and 339,472.71

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Solution

The fourth proportional to 611,418.87, 843,716.93 and 339,472.71 is: 468,449.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,418.87 : 843,716.93 = 339,472.71 : x
  2. Step 2: Convert to fraction form
    611,418.87/843,716.93 = 339,472.71/x
  3. Step 3: Cross multiply
    611,418.87x = 843,716.93 × 339,472.71
  4. Step 4: Simplify right side
    611,418.87x = 286,418,871,002.62
  5. Step 5: Solve for x
    x = 286,418,871,002.62/611,418.87
  6. Step 6: Final answer
    x = 468,449.51

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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.