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Finding the Fourth Proportional to 986.20, 1,361.06 and 593.35

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Solution

The fourth proportional to 986.20, 1,361.06 and 593.35 is: 818.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    986.20 : 1,361.06 = 593.35 : x
  2. Step 2: Convert to fraction form
    986.20/1,361.06 = 593.35/x
  3. Step 3: Cross multiply
    986.20x = 1,361.06 × 593.35
  4. Step 4: Simplify right side
    986.20x = 807,584.95
  5. Step 5: Solve for x
    x = 807,584.95/986.20
  6. Step 6: Final answer
    x = 818.89

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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.