Home / 3,121.49-4,683.96-1,272.46

Finding the Fourth Proportional to 3,121.49, 4,683.96 and 1,272.46

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Solution

The fourth proportional to 3,121.49, 4,683.96 and 1,272.46 is: 1,909.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.49 : 4,683.96 = 1,272.46 : x
  2. Step 2: Convert to fraction form
    3,121.49/4,683.96 = 1,272.46/x
  3. Step 3: Cross multiply
    3,121.49x = 4,683.96 × 1,272.46
  4. Step 4: Simplify right side
    3,121.49x = 5,960,139.89
  5. Step 5: Solve for x
    x = 5,960,139.89/3,121.49
  6. Step 6: Final answer
    x = 1,909.39

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1.5x scale

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.