Home / 2,181.60-3,270.33-947.79

Finding the Fourth Proportional to 2,181.60, 3,270.33 and 947.79

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Solution

The fourth proportional to 2,181.60, 3,270.33 and 947.79 is: 1,420.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,181.60 : 3,270.33 = 947.79 : x
  2. Step 2: Convert to fraction form
    2,181.60/3,270.33 = 947.79/x
  3. Step 3: Cross multiply
    2,181.60x = 3,270.33 × 947.79
  4. Step 4: Simplify right side
    2,181.60x = 3,099,586.07
  5. Step 5: Solve for x
    x = 3,099,586.07/2,181.60
  6. Step 6: Final answer
    x = 1,420.79

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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.