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Finding the Fourth Proportional to 1,093.63, 1,640.40 and 271.89

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Solution

The fourth proportional to 1,093.63, 1,640.40 and 271.89 is: 407.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,093.63 : 1,640.40 = 271.89 : x
  2. Step 2: Convert to fraction form
    1,093.63/1,640.40 = 271.89/x
  3. Step 3: Cross multiply
    1,093.63x = 1,640.40 × 271.89
  4. Step 4: Simplify right side
    1,093.63x = 446,008.36
  5. Step 5: Solve for x
    x = 446,008.36/1,093.63
  6. Step 6: Final answer
    x = 407.82

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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.