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Finding the Fourth Proportional to 986.34, 1,361.17 and 544.29

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Solution

The fourth proportional to 986.34, 1,361.17 and 544.29 is: 751.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    986.34 : 1,361.17 = 544.29 : x
  2. Step 2: Convert to fraction form
    986.34/1,361.17 = 544.29/x
  3. Step 3: Cross multiply
    986.34x = 1,361.17 × 544.29
  4. Step 4: Simplify right side
    986.34x = 740,866.80
  5. Step 5: Solve for x
    x = 740,866.80/986.34
  6. Step 6: Final answer
    x = 751.12

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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.