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Finding the Fourth Proportional to 800.09, 1,200.12 and 252.32

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Solution

The fourth proportional to 800.09, 1,200.12 and 252.32 is: 378.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    800.09 : 1,200.12 = 252.32 : x
  2. Step 2: Convert to fraction form
    800.09/1,200.12 = 252.32/x
  3. Step 3: Cross multiply
    800.09x = 1,200.12 × 252.32
  4. Step 4: Simplify right side
    800.09x = 302,808.28
  5. Step 5: Solve for x
    x = 302,808.28/800.09
  6. Step 6: Final answer
    x = 378.47

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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.