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Finding the Fourth Proportional to 3,186.91, 4,780.40 and 995.65

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Solution

The fourth proportional to 3,186.91, 4,780.40 and 995.65 is: 1,493.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,186.91 : 4,780.40 = 995.65 : x
  2. Step 2: Convert to fraction form
    3,186.91/4,780.40 = 995.65/x
  3. Step 3: Cross multiply
    3,186.91x = 4,780.40 × 995.65
  4. Step 4: Simplify right side
    3,186.91x = 4,759,605.26
  5. Step 5: Solve for x
    x = 4,759,605.26/3,186.91
  6. Step 6: Final answer
    x = 1,493.49

Related Problems

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Half scale
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Double scale
Find fourth proportional to 3,187.91, 4,781.90 and 996.65
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.