Home / 1,217.42-1,826.60-1,081.50

Finding the Fourth Proportional to 1,217.42, 1,826.60 and 1,081.50

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Solution

The fourth proportional to 1,217.42, 1,826.60 and 1,081.50 is: 1,622.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,217.42 : 1,826.60 = 1,081.50 : x
  2. Step 2: Convert to fraction form
    1,217.42/1,826.60 = 1,081.50/x
  3. Step 3: Cross multiply
    1,217.42x = 1,826.60 × 1,081.50
  4. Step 4: Simplify right side
    1,217.42x = 1,975,467.90
  5. Step 5: Solve for x
    x = 1,975,467.90/1,217.42
  6. Step 6: Final answer
    x = 1,622.67

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Double scale
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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.