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Finding the Fourth Proportional to 2,584.50, 3,876.75 and 853.26

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Solution

The fourth proportional to 2,584.50, 3,876.75 and 853.26 is: 1,279.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,584.50 : 3,876.75 = 853.26 : x
  2. Step 2: Convert to fraction form
    2,584.50/3,876.75 = 853.26/x
  3. Step 3: Cross multiply
    2,584.50x = 3,876.75 × 853.26
  4. Step 4: Simplify right side
    2,584.50x = 3,307,875.71
  5. Step 5: Solve for x
    x = 3,307,875.71/2,584.50
  6. Step 6: Final answer
    x = 1,279.89

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Double scale
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Similar ratio
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1.5x scale

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.