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Finding the Fourth Proportional to 1,553.58, 2,143.88 and 889.96

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Solution

The fourth proportional to 1,553.58, 2,143.88 and 889.96 is: 1,228.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,553.58 : 2,143.88 = 889.96 : x
  2. Step 2: Convert to fraction form
    1,553.58/2,143.88 = 889.96/x
  3. Step 3: Cross multiply
    1,553.58x = 2,143.88 × 889.96
  4. Step 4: Simplify right side
    1,553.58x = 1,907,967.44
  5. Step 5: Solve for x
    x = 1,907,967.44/1,553.58
  6. Step 6: Final answer
    x = 1,228.11

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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.