Home / 1,267.80-1,748.25-1,018.38

Finding the Fourth Proportional to 1,267.80, 1,748.25 and 1,018.38

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Solution

The fourth proportional to 1,267.80, 1,748.25 and 1,018.38 is: 1,404.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,267.80 : 1,748.25 = 1,018.38 : x
  2. Step 2: Convert to fraction form
    1,267.80/1,748.25 = 1,018.38/x
  3. Step 3: Cross multiply
    1,267.80x = 1,748.25 × 1,018.38
  4. Step 4: Simplify right side
    1,267.80x = 1,780,382.84
  5. Step 5: Solve for x
    x = 1,780,382.84/1,267.80
  6. Step 6: Final answer
    x = 1,404.31

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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.