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Finding the Fourth Proportional to 785.16, 1,083.31 and 453.53

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Solution

The fourth proportional to 785.16, 1,083.31 and 453.53 is: 625.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    785.16 : 1,083.31 = 453.53 : x
  2. Step 2: Convert to fraction form
    785.16/1,083.31 = 453.53/x
  3. Step 3: Cross multiply
    785.16x = 1,083.31 × 453.53
  4. Step 4: Simplify right side
    785.16x = 491,315.16
  5. Step 5: Solve for x
    x = 491,315.16/785.16
  6. Step 6: Final answer
    x = 625.75

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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.