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Finding the Fourth Proportional to 986.42, 1,361.29 and 544.35

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Solution

The fourth proportional to 986.42, 1,361.29 and 544.35 is: 751.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    986.42 : 1,361.29 = 544.35 : x
  2. Step 2: Convert to fraction form
    986.42/1,361.29 = 544.35/x
  3. Step 3: Cross multiply
    986.42x = 1,361.29 × 544.35
  4. Step 4: Simplify right side
    986.42x = 741,018.21
  5. Step 5: Solve for x
    x = 741,018.21/986.42
  6. Step 6: Final answer
    x = 751.22

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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.