Home / 858,007.20-1,287,120.12-325,680.48

Finding the Fourth Proportional to 858,007.20, 1,287,120.12 and 325,680.48

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Solution

The fourth proportional to 858,007.20, 1,287,120.12 and 325,680.48 is: 488,562.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,007.20 : 1,287,120.12 = 325,680.48 : x
  2. Step 2: Convert to fraction form
    858,007.20/1,287,120.12 = 325,680.48/x
  3. Step 3: Cross multiply
    858,007.20x = 1,287,120.12 × 325,680.48
  4. Step 4: Simplify right side
    858,007.20x = 419,189,898,499.26
  5. Step 5: Solve for x
    x = 419,189,898,499.26/858,007.20
  6. Step 6: Final answer
    x = 488,562.22

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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.