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Finding the Fourth Proportional to 853.25, 1,277.10 and 646.43

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Solution

The fourth proportional to 853.25, 1,277.10 and 646.43 is: 967.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    853.25 : 1,277.10 = 646.43 : x
  2. Step 2: Convert to fraction form
    853.25/1,277.10 = 646.43/x
  3. Step 3: Cross multiply
    853.25x = 1,277.10 × 646.43
  4. Step 4: Simplify right side
    853.25x = 825,555.75
  5. Step 5: Solve for x
    x = 825,555.75/853.25
  6. Step 6: Final answer
    x = 967.54

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Double scale
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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.