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Finding the Fourth Proportional to 3,230.12, 4,845.12 and 890.12

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Solution

The fourth proportional to 3,230.12, 4,845.12 and 890.12 is: 1,335.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,230.12 : 4,845.12 = 890.12 : x
  2. Step 2: Convert to fraction form
    3,230.12/4,845.12 = 890.12/x
  3. Step 3: Cross multiply
    3,230.12x = 4,845.12 × 890.12
  4. Step 4: Simplify right side
    3,230.12x = 4,312,713.99
  5. Step 5: Solve for x
    x = 4,312,713.99/3,230.12
  6. Step 6: Final answer
    x = 1,335.16

Related Problems

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Half scale
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Double scale
Find fourth proportional to 3,231.12, 4,846.62 and 891.12
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.