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Finding the Fourth Proportional to 1,679.63, 2,519.44 and 653.63

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Solution

The fourth proportional to 1,679.63, 2,519.44 and 653.63 is: 980.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,679.63 : 2,519.44 = 653.63 : x
  2. Step 2: Convert to fraction form
    1,679.63/2,519.44 = 653.63/x
  3. Step 3: Cross multiply
    1,679.63x = 2,519.44 × 653.63
  4. Step 4: Simplify right side
    1,679.63x = 1,646,767.34
  5. Step 5: Solve for x
    x = 1,646,767.34/1,679.63
  6. Step 6: Final answer
    x = 980.44

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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.