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Finding the Fourth Proportional to 511,375.55, 767,063.31 and 485,804.74

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Solution

The fourth proportional to 511,375.55, 767,063.31 and 485,804.74 is: 728,707.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    511,375.55 : 767,063.31 = 485,804.74 : x
  2. Step 2: Convert to fraction form
    511,375.55/767,063.31 = 485,804.74/x
  3. Step 3: Cross multiply
    511,375.55x = 767,063.31 × 485,804.74
  4. Step 4: Simplify right side
    511,375.55x = 372,642,987,531.41
  5. Step 5: Solve for x
    x = 372,642,987,531.41/511,375.55
  6. Step 6: Final answer
    x = 728,707.09

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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.