Home / 3,121.18-4,307.07-1,723.66

Finding the Fourth Proportional to 3,121.18, 4,307.07 and 1,723.66

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Solution

The fourth proportional to 3,121.18, 4,307.07 and 1,723.66 is: 2,378.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.18 : 4,307.07 = 1,723.66 : x
  2. Step 2: Convert to fraction form
    3,121.18/4,307.07 = 1,723.66/x
  3. Step 3: Cross multiply
    3,121.18x = 4,307.07 × 1,723.66
  4. Step 4: Simplify right side
    3,121.18x = 7,423,924.28
  5. Step 5: Solve for x
    x = 7,423,924.28/3,121.18
  6. Step 6: Final answer
    x = 2,378.56

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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.