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Finding the Fourth Proportional to 1,208.23, 1,810.72 and 994.39

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Solution

The fourth proportional to 1,208.23, 1,810.72 and 994.39 is: 1,490.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,208.23 : 1,810.72 = 994.39 : x
  2. Step 2: Convert to fraction form
    1,208.23/1,810.72 = 994.39/x
  3. Step 3: Cross multiply
    1,208.23x = 1,810.72 × 994.39
  4. Step 4: Simplify right side
    1,208.23x = 1,800,558.58
  5. Step 5: Solve for x
    x = 1,800,558.58/1,208.23
  6. Step 6: Final answer
    x = 1,490.25

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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.