Home / 1,638.42-2,454.81-1,091.70

Finding the Fourth Proportional to 1,638.42, 2,454.81 and 1,091.70

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Solution

The fourth proportional to 1,638.42, 2,454.81 and 1,091.70 is: 1,635.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,638.42 : 2,454.81 = 1,091.70 : x
  2. Step 2: Convert to fraction form
    1,638.42/2,454.81 = 1,091.70/x
  3. Step 3: Cross multiply
    1,638.42x = 2,454.81 × 1,091.70
  4. Step 4: Simplify right side
    1,638.42x = 2,679,916.08
  5. Step 5: Solve for x
    x = 2,679,916.08/1,638.42
  6. Step 6: Final answer
    x = 1,635.67

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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.