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Finding the Fourth Proportional to 405,939.88, 608,968.14 and 125,479

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Solution

The fourth proportional to 405,939.88, 608,968.14 and 125,479 is: 188,236.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,939.88 : 608,968.14 = 125,479 : x
  2. Step 2: Convert to fraction form
    405,939.88/608,968.14 = 125,479/x
  3. Step 3: Cross multiply
    405,939.88x = 608,968.14 × 125,479
  4. Step 4: Simplify right side
    405,939.88x = 76,412,713,239.06
  5. Step 5: Solve for x
    x = 76,412,713,239.06/405,939.88
  6. Step 6: Final answer
    x = 188,236.53

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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.