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Finding the Fourth Proportional to 2,172.73, 2,998.33 and 1,178

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Solution

The fourth proportional to 2,172.73, 2,998.33 and 1,178 is: 1,625.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,172.73 : 2,998.33 = 1,178 : x
  2. Step 2: Convert to fraction form
    2,172.73/2,998.33 = 1,178/x
  3. Step 3: Cross multiply
    2,172.73x = 2,998.33 × 1,178
  4. Step 4: Simplify right side
    2,172.73x = 3,532,032.74
  5. Step 5: Solve for x
    x = 3,532,032.74/2,172.73
  6. Step 6: Final answer
    x = 1,625.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.