Home / 858,449.44-1,287,376.71-431,820.37

Finding the Fourth Proportional to 858,449.44, 1,287,376.71 and 431,820.37

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Solution

The fourth proportional to 858,449.44, 1,287,376.71 and 431,820.37 is: 647,580.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,449.44 : 1,287,376.71 = 431,820.37 : x
  2. Step 2: Convert to fraction form
    858,449.44/1,287,376.71 = 431,820.37/x
  3. Step 3: Cross multiply
    858,449.44x = 1,287,376.71 × 431,820.37
  4. Step 4: Simplify right side
    858,449.44x = 555,915,487,241.58
  5. Step 5: Solve for x
    x = 555,915,487,241.58/858,449.44
  6. Step 6: Final answer
    x = 647,580.93

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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.