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Finding the Fourth Proportional to 1,679.51, 2,519.72 and 509.47

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Solution

The fourth proportional to 1,679.51, 2,519.72 and 509.47 is: 764.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,679.51 : 2,519.72 = 509.47 : x
  2. Step 2: Convert to fraction form
    1,679.51/2,519.72 = 509.47/x
  3. Step 3: Cross multiply
    1,679.51x = 2,519.72 × 509.47
  4. Step 4: Simplify right side
    1,679.51x = 1,283,709.15
  5. Step 5: Solve for x
    x = 1,283,709.15/1,679.51
  6. Step 6: Final answer
    x = 764.34

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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.