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Finding the Fourth Proportional to 351,891.40, 485,361.28 and 215,932.36

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Solution

The fourth proportional to 351,891.40, 485,361.28 and 215,932.36 is: 297,833.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,891.40 : 485,361.28 = 215,932.36 : x
  2. Step 2: Convert to fraction form
    351,891.40/485,361.28 = 215,932.36/x
  3. Step 3: Cross multiply
    351,891.40x = 485,361.28 × 215,932.36
  4. Step 4: Simplify right side
    351,891.40x = 104,805,206,643.02
  5. Step 5: Solve for x
    x = 104,805,206,643.02/351,891.40
  6. Step 6: Final answer
    x = 297,833.95

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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.