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Finding the Fourth Proportional to 1,236.31, 1,706.12 and 676.79

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Solution

The fourth proportional to 1,236.31, 1,706.12 and 676.79 is: 933.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,236.31 : 1,706.12 = 676.79 : x
  2. Step 2: Convert to fraction form
    1,236.31/1,706.12 = 676.79/x
  3. Step 3: Cross multiply
    1,236.31x = 1,706.12 × 676.79
  4. Step 4: Simplify right side
    1,236.31x = 1,154,684.95
  5. Step 5: Solve for x
    x = 1,154,684.95/1,236.31
  6. Step 6: Final answer
    x = 933.98

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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.