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Finding the Fourth Proportional to 986.60, 1,361.50 and 544.51

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Solution

The fourth proportional to 986.60, 1,361.50 and 544.51 is: 751.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    986.60 : 1,361.50 = 544.51 : x
  2. Step 2: Convert to fraction form
    986.60/1,361.50 = 544.51/x
  3. Step 3: Cross multiply
    986.60x = 1,361.50 × 544.51
  4. Step 4: Simplify right side
    986.60x = 741,350.37
  5. Step 5: Solve for x
    x = 741,350.37/986.60
  6. Step 6: Final answer
    x = 751.42

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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.