Home / 1,980.79-2,968.35-1,113.28

Finding the Fourth Proportional to 1,980.79, 2,968.35 and 1,113.28

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Solution

The fourth proportional to 1,980.79, 2,968.35 and 1,113.28 is: 1,668.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,980.79 : 2,968.35 = 1,113.28 : x
  2. Step 2: Convert to fraction form
    1,980.79/2,968.35 = 1,113.28/x
  3. Step 3: Cross multiply
    1,980.79x = 2,968.35 × 1,113.28
  4. Step 4: Simplify right side
    1,980.79x = 3,304,604.69
  5. Step 5: Solve for x
    x = 3,304,604.69/1,980.79
  6. Step 6: Final answer
    x = 1,668.33

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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.