Home / 3,211.10-4,815.60-1,130.75

Finding the Fourth Proportional to 3,211.10, 4,815.60 and 1,130.75

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Solution

The fourth proportional to 3,211.10, 4,815.60 and 1,130.75 is: 1,695.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,211.10 : 4,815.60 = 1,130.75 : x
  2. Step 2: Convert to fraction form
    3,211.10/4,815.60 = 1,130.75/x
  3. Step 3: Cross multiply
    3,211.10x = 4,815.60 × 1,130.75
  4. Step 4: Simplify right side
    3,211.10x = 5,445,239.70
  5. Step 5: Solve for x
    x = 5,445,239.70/3,211.10
  6. Step 6: Final answer
    x = 1,695.76

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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.