Home / 2,068.31-3,101.70-1,287.17

Finding the Fourth Proportional to 2,068.31, 3,101.70 and 1,287.17

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Solution

The fourth proportional to 2,068.31, 3,101.70 and 1,287.17 is: 1,930.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,068.31 : 3,101.70 = 1,287.17 : x
  2. Step 2: Convert to fraction form
    2,068.31/3,101.70 = 1,287.17/x
  3. Step 3: Cross multiply
    2,068.31x = 3,101.70 × 1,287.17
  4. Step 4: Simplify right side
    2,068.31x = 3,992,415.19
  5. Step 5: Solve for x
    x = 3,992,415.19/2,068.31
  6. Step 6: Final answer
    x = 1,930.28

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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.