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Finding the Fourth Proportional to 986.81, 1,480.22 and 401.83

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Solution

The fourth proportional to 986.81, 1,480.22 and 401.83 is: 602.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    986.81 : 1,480.22 = 401.83 : x
  2. Step 2: Convert to fraction form
    986.81/1,480.22 = 401.83/x
  3. Step 3: Cross multiply
    986.81x = 1,480.22 × 401.83
  4. Step 4: Simplify right side
    986.81x = 594,796.80
  5. Step 5: Solve for x
    x = 594,796.80/986.81
  6. Step 6: Final answer
    x = 602.75

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.