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Finding the Fourth Proportional to 1,581, 2,181.89 and 882.39

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Solution

The fourth proportional to 1,581, 2,181.89 and 882.39 is: 1,217.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,581 : 2,181.89 = 882.39 : x
  2. Step 2: Convert to fraction form
    1,581/2,181.89 = 882.39/x
  3. Step 3: Cross multiply
    1,581x = 2,181.89 × 882.39
  4. Step 4: Simplify right side
    1,581x = 1,925,273.51
  5. Step 5: Solve for x
    x = 1,925,273.51/1,581
  6. Step 6: Final answer
    x = 1,217.76

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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.