Home / 1,279-1,918.23-1,036.90

Finding the Fourth Proportional to 1,279, 1,918.23 and 1,036.90

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Solution

The fourth proportional to 1,279, 1,918.23 and 1,036.90 is: 1,555.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279 : 1,918.23 = 1,036.90 : x
  2. Step 2: Convert to fraction form
    1,279/1,918.23 = 1,036.90/x
  3. Step 3: Cross multiply
    1,279x = 1,918.23 × 1,036.90
  4. Step 4: Simplify right side
    1,279x = 1,989,012.69
  5. Step 5: Solve for x
    x = 1,989,012.69/1,279
  6. Step 6: Final answer
    x = 1,555.13

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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.