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Finding the Fourth Proportional to 785.39, 1,083.62 and 453.69

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Solution

The fourth proportional to 785.39, 1,083.62 and 453.69 is: 625.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    785.39 : 1,083.62 = 453.69 : x
  2. Step 2: Convert to fraction form
    785.39/1,083.62 = 453.69/x
  3. Step 3: Cross multiply
    785.39x = 1,083.62 × 453.69
  4. Step 4: Simplify right side
    785.39x = 491,625.29
  5. Step 5: Solve for x
    x = 491,625.29/785.39
  6. Step 6: Final answer
    x = 625.97

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Double scale
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1.5x scale

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.