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Finding the Fourth Proportional to 1,213.81, 1,820.09 and 433.51

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Solution

The fourth proportional to 1,213.81, 1,820.09 and 433.51 is: 650.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,213.81 : 1,820.09 = 433.51 : x
  2. Step 2: Convert to fraction form
    1,213.81/1,820.09 = 433.51/x
  3. Step 3: Cross multiply
    1,213.81x = 1,820.09 × 433.51
  4. Step 4: Simplify right side
    1,213.81x = 789,025.05
  5. Step 5: Solve for x
    x = 789,025.05/1,213.81
  6. Step 6: Final answer
    x = 650.04

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Double scale
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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.