Home / 309,039.03-462,935.25-258,978.60

Finding the Fourth Proportional to 309,039.03, 462,935.25 and 258,978.60

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Solution

The fourth proportional to 309,039.03, 462,935.25 and 258,978.60 is: 387,945.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,039.03 : 462,935.25 = 258,978.60 : x
  2. Step 2: Convert to fraction form
    309,039.03/462,935.25 = 258,978.60/x
  3. Step 3: Cross multiply
    309,039.03x = 462,935.25 × 258,978.60
  4. Step 4: Simplify right side
    309,039.03x = 119,890,322,935.65
  5. Step 5: Solve for x
    x = 119,890,322,935.65/309,039.03
  6. Step 6: Final answer
    x = 387,945.57

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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.