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Finding the Fourth Proportional to 1,325.16, 1,986.12 and 995.22

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Solution

The fourth proportional to 1,325.16, 1,986.12 and 995.22 is: 1,491.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,325.16 : 1,986.12 = 995.22 : x
  2. Step 2: Convert to fraction form
    1,325.16/1,986.12 = 995.22/x
  3. Step 3: Cross multiply
    1,325.16x = 1,986.12 × 995.22
  4. Step 4: Simplify right side
    1,325.16x = 1,976,626.35
  5. Step 5: Solve for x
    x = 1,976,626.35/1,325.16
  6. Step 6: Final answer
    x = 1,491.61

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Half scale
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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.