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Finding the Fourth Proportional to 2,129.98, 3,194.99 and 743.31

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Solution

The fourth proportional to 2,129.98, 3,194.99 and 743.31 is: 1,114.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,129.98 : 3,194.99 = 743.31 : x
  2. Step 2: Convert to fraction form
    2,129.98/3,194.99 = 743.31/x
  3. Step 3: Cross multiply
    2,129.98x = 3,194.99 × 743.31
  4. Step 4: Simplify right side
    2,129.98x = 2,374,879.07
  5. Step 5: Solve for x
    x = 2,374,879.07/2,129.98
  6. Step 6: Final answer
    x = 1,114.98

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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.