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Finding the Fourth Proportional to 3,458.95, 5,187.66 and 993.22

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Solution

The fourth proportional to 3,458.95, 5,187.66 and 993.22 is: 1,489.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,458.95 : 5,187.66 = 993.22 : x
  2. Step 2: Convert to fraction form
    3,458.95/5,187.66 = 993.22/x
  3. Step 3: Cross multiply
    3,458.95x = 5,187.66 × 993.22
  4. Step 4: Simplify right side
    3,458.95x = 5,152,496.01
  5. Step 5: Solve for x
    x = 5,152,496.01/3,458.95
  6. Step 6: Final answer
    x = 1,489.61

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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.