Home / 1,428.63-1,969.68-1,133.38

Finding the Fourth Proportional to 1,428.63, 1,969.68 and 1,133.38

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Solution

The fourth proportional to 1,428.63, 1,969.68 and 1,133.38 is: 1,562.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428.63 : 1,969.68 = 1,133.38 : x
  2. Step 2: Convert to fraction form
    1,428.63/1,969.68 = 1,133.38/x
  3. Step 3: Cross multiply
    1,428.63x = 1,969.68 × 1,133.38
  4. Step 4: Simplify right side
    1,428.63x = 2,232,395.92
  5. Step 5: Solve for x
    x = 2,232,395.92/1,428.63
  6. Step 6: Final answer
    x = 1,562.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.