Home / 851,980.40-1,279,007.40-431,039.60

Finding the Fourth Proportional to 851,980.40, 1,279,007.40 and 431,039.60

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Solution

The fourth proportional to 851,980.40, 1,279,007.40 and 431,039.60 is: 647,083.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    851,980.40 : 1,279,007.40 = 431,039.60 : x
  2. Step 2: Convert to fraction form
    851,980.40/1,279,007.40 = 431,039.60/x
  3. Step 3: Cross multiply
    851,980.40x = 1,279,007.40 × 431,039.60
  4. Step 4: Simplify right side
    851,980.40x = 551,302,838,093.04
  5. Step 5: Solve for x
    x = 551,302,838,093.04/851,980.40
  6. Step 6: Final answer
    x = 647,083.94

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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.