Home / 2,091.20-3,136.70-630.31

Finding the Fourth Proportional to 2,091.20, 3,136.70 and 630.31

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Solution

The fourth proportional to 2,091.20, 3,136.70 and 630.31 is: 945.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,091.20 : 3,136.70 = 630.31 : x
  2. Step 2: Convert to fraction form
    2,091.20/3,136.70 = 630.31/x
  3. Step 3: Cross multiply
    2,091.20x = 3,136.70 × 630.31
  4. Step 4: Simplify right side
    2,091.20x = 1,977,093.38
  5. Step 5: Solve for x
    x = 1,977,093.38/2,091.20
  6. Step 6: Final answer
    x = 945.44

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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.