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Finding the Fourth Proportional to 986.36, 1,361.58 and 676.04

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Solution

The fourth proportional to 986.36, 1,361.58 and 676.04 is: 933.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    986.36 : 1,361.58 = 676.04 : x
  2. Step 2: Convert to fraction form
    986.36/1,361.58 = 676.04/x
  3. Step 3: Cross multiply
    986.36x = 1,361.58 × 676.04
  4. Step 4: Simplify right side
    986.36x = 920,482.54
  5. Step 5: Solve for x
    x = 920,482.54/986.36
  6. Step 6: Final answer
    x = 933.21

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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.