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Finding the Fourth Proportional to 2,636.89, 3,955.33 and 993.80

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Solution

The fourth proportional to 2,636.89, 3,955.33 and 993.80 is: 1,490.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,636.89 : 3,955.33 = 993.80 : x
  2. Step 2: Convert to fraction form
    2,636.89/3,955.33 = 993.80/x
  3. Step 3: Cross multiply
    2,636.89x = 3,955.33 × 993.80
  4. Step 4: Simplify right side
    2,636.89x = 3,930,818.08
  5. Step 5: Solve for x
    x = 3,930,818.08/2,636.89
  6. Step 6: Final answer
    x = 1,490.70

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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.