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Finding the Fourth Proportional to 605,505.12, 907,942.31 and 285,571.08

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Solution

The fourth proportional to 605,505.12, 907,942.31 and 285,571.08 is: 428,207.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,505.12 : 907,942.31 = 285,571.08 : x
  2. Step 2: Convert to fraction form
    605,505.12/907,942.31 = 285,571.08/x
  3. Step 3: Cross multiply
    605,505.12x = 907,942.31 × 285,571.08
  4. Step 4: Simplify right side
    605,505.12x = 259,282,071,443.36
  5. Step 5: Solve for x
    x = 259,282,071,443.36/605,505.12
  6. Step 6: Final answer
    x = 428,207.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.