Home / 3,119.90-4,680.51-1,172.12

Finding the Fourth Proportional to 3,119.90, 4,680.51 and 1,172.12

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Solution

The fourth proportional to 3,119.90, 4,680.51 and 1,172.12 is: 1,758.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,119.90 : 4,680.51 = 1,172.12 : x
  2. Step 2: Convert to fraction form
    3,119.90/4,680.51 = 1,172.12/x
  3. Step 3: Cross multiply
    3,119.90x = 4,680.51 × 1,172.12
  4. Step 4: Simplify right side
    3,119.90x = 5,486,119.38
  5. Step 5: Solve for x
    x = 5,486,119.38/3,119.90
  6. Step 6: Final answer
    x = 1,758.43

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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.