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Finding the Fourth Proportional to 2,548.22, 3,819.96 and 989.24

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Solution

The fourth proportional to 2,548.22, 3,819.96 and 989.24 is: 1,482.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,548.22 : 3,819.96 = 989.24 : x
  2. Step 2: Convert to fraction form
    2,548.22/3,819.96 = 989.24/x
  3. Step 3: Cross multiply
    2,548.22x = 3,819.96 × 989.24
  4. Step 4: Simplify right side
    2,548.22x = 3,778,857.23
  5. Step 5: Solve for x
    x = 3,778,857.23/2,548.22
  6. Step 6: Final answer
    x = 1,482.94

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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.