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Finding the Fourth Proportional to 785.00, 1,083.15 and 453.30

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Solution

The fourth proportional to 785.00, 1,083.15 and 453.30 is: 625.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    785.00 : 1,083.15 = 453.30 : x
  2. Step 2: Convert to fraction form
    785.00/1,083.15 = 453.30/x
  3. Step 3: Cross multiply
    785.00x = 1,083.15 × 453.30
  4. Step 4: Simplify right side
    785.00x = 490,991.90
  5. Step 5: Solve for x
    x = 490,991.90/785.00
  6. Step 6: Final answer
    x = 625.47

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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.