Home / 1,445.03-2,168.60-1,078.70

Finding the Fourth Proportional to 1,445.03, 2,168.60 and 1,078.70

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Solution

The fourth proportional to 1,445.03, 2,168.60 and 1,078.70 is: 1,618.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,445.03 : 2,168.60 = 1,078.70 : x
  2. Step 2: Convert to fraction form
    1,445.03/2,168.60 = 1,078.70/x
  3. Step 3: Cross multiply
    1,445.03x = 2,168.60 × 1,078.70
  4. Step 4: Simplify right side
    1,445.03x = 2,339,252.58
  5. Step 5: Solve for x
    x = 2,339,252.58/1,445.03
  6. Step 6: Final answer
    x = 1,618.83

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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.