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Finding the Fourth Proportional to 481,418.84, 664,380.81 and 290,428.13

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Solution

The fourth proportional to 481,418.84, 664,380.81 and 290,428.13 is: 400,804.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    481,418.84 : 664,380.81 = 290,428.13 : x
  2. Step 2: Convert to fraction form
    481,418.84/664,380.81 = 290,428.13/x
  3. Step 3: Cross multiply
    481,418.84x = 664,380.81 × 290,428.13
  4. Step 4: Simplify right side
    481,418.84x = 192,954,872,934.28
  5. Step 5: Solve for x
    x = 192,954,872,934.28/481,418.84
  6. Step 6: Final answer
    x = 400,804.58

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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.