Home / 1,812.38-2,719.01-513.81

Finding the Fourth Proportional to 1,812.38, 2,719.01 and 513.81

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Solution

The fourth proportional to 1,812.38, 2,719.01 and 513.81 is: 770.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,812.38 : 2,719.01 = 513.81 : x
  2. Step 2: Convert to fraction form
    1,812.38/2,719.01 = 513.81/x
  3. Step 3: Cross multiply
    1,812.38x = 2,719.01 × 513.81
  4. Step 4: Simplify right side
    1,812.38x = 1,397,054.53
  5. Step 5: Solve for x
    x = 1,397,054.53/1,812.38
  6. Step 6: Final answer
    x = 770.84

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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.