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Finding the Fourth Proportional to 208,379.98, 310,739.77 and 206,485.39

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Solution

The fourth proportional to 208,379.98, 310,739.77 and 206,485.39 is: 307,914.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,379.98 : 310,739.77 = 206,485.39 : x
  2. Step 2: Convert to fraction form
    208,379.98/310,739.77 = 206,485.39/x
  3. Step 3: Cross multiply
    208,379.98x = 310,739.77 × 206,485.39
  4. Step 4: Simplify right side
    208,379.98x = 64,163,222,596.96
  5. Step 5: Solve for x
    x = 64,163,222,596.96/208,379.98
  6. Step 6: Final answer
    x = 307,914.53

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.