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Finding the Fourth Proportional to 511,991.20, 767,007.60 and 275,255.20

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Solution

The fourth proportional to 511,991.20, 767,007.60 and 275,255.20 is: 412,356.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    511,991.20 : 767,007.60 = 275,255.20 : x
  2. Step 2: Convert to fraction form
    511,991.20/767,007.60 = 275,255.20/x
  3. Step 3: Cross multiply
    511,991.20x = 767,007.60 × 275,255.20
  4. Step 4: Simplify right side
    511,991.20x = 211,122,830,339.52
  5. Step 5: Solve for x
    x = 211,122,830,339.52/511,991.20
  6. Step 6: Final answer
    x = 412,356.37

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Similar ratio
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1.5x scale

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.