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Finding the Fourth Proportional to 3,455.17, 5,181.99 and 989.44

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Solution

The fourth proportional to 3,455.17, 5,181.99 and 989.44 is: 1,483.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,455.17 : 5,181.99 = 989.44 : x
  2. Step 2: Convert to fraction form
    3,455.17/5,181.99 = 989.44/x
  3. Step 3: Cross multiply
    3,455.17x = 5,181.99 × 989.44
  4. Step 4: Simplify right side
    3,455.17x = 5,127,268.19
  5. Step 5: Solve for x
    x = 5,127,268.19/3,455.17
  6. Step 6: Final answer
    x = 1,483.94

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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.