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Finding the Fourth Proportional to 784.56, 1,082.67 and 453.09

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Solution

The fourth proportional to 784.56, 1,082.67 and 453.09 is: 625.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    784.56 : 1,082.67 = 453.09 : x
  2. Step 2: Convert to fraction form
    784.56/1,082.67 = 453.09/x
  3. Step 3: Cross multiply
    784.56x = 1,082.67 × 453.09
  4. Step 4: Simplify right side
    784.56x = 490,546.95
  5. Step 5: Solve for x
    x = 490,546.95/784.56
  6. Step 6: Final answer
    x = 625.25

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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.