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Finding the Fourth Proportional to 785.24, 1,083.42 and 453.65

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Solution

The fourth proportional to 785.24, 1,083.42 and 453.65 is: 625.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    785.24 : 1,083.42 = 453.65 : x
  2. Step 2: Convert to fraction form
    785.24/1,083.42 = 453.65/x
  3. Step 3: Cross multiply
    785.24x = 1,083.42 × 453.65
  4. Step 4: Simplify right side
    785.24x = 491,488.07
  5. Step 5: Solve for x
    x = 491,488.07/785.24
  6. Step 6: Final answer
    x = 625.91

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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.