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Finding the Fourth Proportional to 1,236.02, 1,705.28 and 882

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Solution

The fourth proportional to 1,236.02, 1,705.28 and 882 is: 1,216.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,236.02 : 1,705.28 = 882 : x
  2. Step 2: Convert to fraction form
    1,236.02/1,705.28 = 882/x
  3. Step 3: Cross multiply
    1,236.02x = 1,705.28 × 882
  4. Step 4: Simplify right side
    1,236.02x = 1,504,056.96
  5. Step 5: Solve for x
    x = 1,504,056.96/1,236.02
  6. Step 6: Final answer
    x = 1,216.85

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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.