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Finding the Fourth Proportional to 1,769.22, 2,653.80 and 989.07

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Solution

The fourth proportional to 1,769.22, 2,653.80 and 989.07 is: 1,483.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,769.22 : 2,653.80 = 989.07 : x
  2. Step 2: Convert to fraction form
    1,769.22/2,653.80 = 989.07/x
  3. Step 3: Cross multiply
    1,769.22x = 2,653.80 × 989.07
  4. Step 4: Simplify right side
    1,769.22x = 2,624,793.97
  5. Step 5: Solve for x
    x = 2,624,793.97/1,769.22
  6. Step 6: Final answer
    x = 1,483.59

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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.