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Finding the Fourth Proportional to 784.82, 1,083 and 619.44

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Solution

The fourth proportional to 784.82, 1,083 and 619.44 is: 854.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    784.82 : 1,083 = 619.44 : x
  2. Step 2: Convert to fraction form
    784.82/1,083 = 619.44/x
  3. Step 3: Cross multiply
    784.82x = 1,083 × 619.44
  4. Step 4: Simplify right side
    784.82x = 670,853.52
  5. Step 5: Solve for x
    x = 670,853.52/784.82
  6. Step 6: Final answer
    x = 854.79

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.