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Finding the Fourth Proportional to 986.38, 1,478.93 and 466.43

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Solution

The fourth proportional to 986.38, 1,478.93 and 466.43 is: 699.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    986.38 : 1,478.93 = 466.43 : x
  2. Step 2: Convert to fraction form
    986.38/1,478.93 = 466.43/x
  3. Step 3: Cross multiply
    986.38x = 1,478.93 × 466.43
  4. Step 4: Simplify right side
    986.38x = 689,807.59
  5. Step 5: Solve for x
    x = 689,807.59/986.38
  6. Step 6: Final answer
    x = 699.33

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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.