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Finding the Fourth Proportional to 2,345.82, 3,519.09 and 785.53

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Solution

The fourth proportional to 2,345.82, 3,519.09 and 785.53 is: 1,178.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,345.82 : 3,519.09 = 785.53 : x
  2. Step 2: Convert to fraction form
    2,345.82/3,519.09 = 785.53/x
  3. Step 3: Cross multiply
    2,345.82x = 3,519.09 × 785.53
  4. Step 4: Simplify right side
    2,345.82x = 2,764,350.77
  5. Step 5: Solve for x
    x = 2,764,350.77/2,345.82
  6. Step 6: Final answer
    x = 1,178.42

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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.