Home / 3,121.04-4,307.02-1,723.78

Finding the Fourth Proportional to 3,121.04, 4,307.02 and 1,723.78

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Solution

The fourth proportional to 3,121.04, 4,307.02 and 1,723.78 is: 2,378.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.04 : 4,307.02 = 1,723.78 : x
  2. Step 2: Convert to fraction form
    3,121.04/4,307.02 = 1,723.78/x
  3. Step 3: Cross multiply
    3,121.04x = 4,307.02 × 1,723.78
  4. Step 4: Simplify right side
    3,121.04x = 7,424,354.94
  5. Step 5: Solve for x
    x = 7,424,354.94/3,121.04
  6. Step 6: Final answer
    x = 2,378.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.