Home / 3,436.21-5,154.32-839.13

Finding the Fourth Proportional to 3,436.21, 5,154.32 and 839.13

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Solution

The fourth proportional to 3,436.21, 5,154.32 and 839.13 is: 1,258.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,436.21 : 5,154.32 = 839.13 : x
  2. Step 2: Convert to fraction form
    3,436.21/5,154.32 = 839.13/x
  3. Step 3: Cross multiply
    3,436.21x = 5,154.32 × 839.13
  4. Step 4: Simplify right side
    3,436.21x = 4,325,114.57
  5. Step 5: Solve for x
    x = 4,325,114.57/3,436.21
  6. Step 6: Final answer
    x = 1,258.69

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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.