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Finding the Fourth Proportional to 390,618.33, 585,974.37 and 137,846.63

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Solution

The fourth proportional to 390,618.33, 585,974.37 and 137,846.63 is: 206,786.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,618.33 : 585,974.37 = 137,846.63 : x
  2. Step 2: Convert to fraction form
    390,618.33/585,974.37 = 137,846.63/x
  3. Step 3: Cross multiply
    390,618.33x = 585,974.37 × 137,846.63
  4. Step 4: Simplify right side
    390,618.33x = 80,774,589,241.00
  5. Step 5: Solve for x
    x = 80,774,589,241.00/390,618.33
  6. Step 6: Final answer
    x = 206,786.48

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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.