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Finding the Fourth Proportional to 1,236.13, 1,705.81 and 676.58

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Solution

The fourth proportional to 1,236.13, 1,705.81 and 676.58 is: 933.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,236.13 : 1,705.81 = 676.58 : x
  2. Step 2: Convert to fraction form
    1,236.13/1,705.81 = 676.58/x
  3. Step 3: Cross multiply
    1,236.13x = 1,705.81 × 676.58
  4. Step 4: Simplify right side
    1,236.13x = 1,154,124.27
  5. Step 5: Solve for x
    x = 1,154,124.27/1,236.13
  6. Step 6: Final answer
    x = 933.66

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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.