Home / 1,511.91-2,270.30-938.43

Finding the Fourth Proportional to 1,511.91, 2,270.30 and 938.43

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Solution

The fourth proportional to 1,511.91, 2,270.30 and 938.43 is: 1,409.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,511.91 : 2,270.30 = 938.43 : x
  2. Step 2: Convert to fraction form
    1,511.91/2,270.30 = 938.43/x
  3. Step 3: Cross multiply
    1,511.91x = 2,270.30 × 938.43
  4. Step 4: Simplify right side
    1,511.91x = 2,130,512.94
  5. Step 5: Solve for x
    x = 2,130,512.94/1,511.91
  6. Step 6: Final answer
    x = 1,409.15

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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.