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Finding the Fourth Proportional to 986.68, 1,361.70 and 544.67

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Solution

The fourth proportional to 986.68, 1,361.70 and 544.67 is: 751.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    986.68 : 1,361.70 = 544.67 : x
  2. Step 2: Convert to fraction form
    986.68/1,361.70 = 544.67/x
  3. Step 3: Cross multiply
    986.68x = 1,361.70 × 544.67
  4. Step 4: Simplify right side
    986.68x = 741,677.14
  5. Step 5: Solve for x
    x = 741,677.14/986.68
  6. Step 6: Final answer
    x = 751.69

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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.