Home / 3,121.18-4,307.28-1,704.90

Finding the Fourth Proportional to 3,121.18, 4,307.28 and 1,704.90

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Solution

The fourth proportional to 3,121.18, 4,307.28 and 1,704.90 is: 2,352.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.18 : 4,307.28 = 1,704.90 : x
  2. Step 2: Convert to fraction form
    3,121.18/4,307.28 = 1,704.90/x
  3. Step 3: Cross multiply
    3,121.18x = 4,307.28 × 1,704.90
  4. Step 4: Simplify right side
    3,121.18x = 7,343,467.20
  5. Step 5: Solve for x
    x = 7,343,467.20/3,121.18
  6. Step 6: Final answer
    x = 2,352.78

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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.