Home / 1,938.31-2,911.20-1,661.29

Finding the Fourth Proportional to 1,938.31, 2,911.20 and 1,661.29

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Solution

The fourth proportional to 1,938.31, 2,911.20 and 1,661.29 is: 2,495.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,938.31 : 2,911.20 = 1,661.29 : x
  2. Step 2: Convert to fraction form
    1,938.31/2,911.20 = 1,661.29/x
  3. Step 3: Cross multiply
    1,938.31x = 2,911.20 × 1,661.29
  4. Step 4: Simplify right side
    1,938.31x = 4,836,339.14
  5. Step 5: Solve for x
    x = 4,836,339.14/1,938.31
  6. Step 6: Final answer
    x = 2,495.13

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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.