Home / 1,415.38-2,119.32-764.14

Finding the Fourth Proportional to 1,415.38, 2,119.32 and 764.14

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Solution

The fourth proportional to 1,415.38, 2,119.32 and 764.14 is: 1,144.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,415.38 : 2,119.32 = 764.14 : x
  2. Step 2: Convert to fraction form
    1,415.38/2,119.32 = 764.14/x
  3. Step 3: Cross multiply
    1,415.38x = 2,119.32 × 764.14
  4. Step 4: Simplify right side
    1,415.38x = 1,619,457.18
  5. Step 5: Solve for x
    x = 1,619,457.18/1,415.38
  6. Step 6: Final answer
    x = 1,144.19

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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.