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Finding the Fourth Proportional to 784.77, 1,083.27 and 673.80

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Solution

The fourth proportional to 784.77, 1,083.27 and 673.80 is: 930.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    784.77 : 1,083.27 = 673.80 : x
  2. Step 2: Convert to fraction form
    784.77/1,083.27 = 673.80/x
  3. Step 3: Cross multiply
    784.77x = 1,083.27 × 673.80
  4. Step 4: Simplify right side
    784.77x = 729,909.85
  5. Step 5: Solve for x
    x = 729,909.85/784.77
  6. Step 6: Final answer
    x = 930.09

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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.