Home / 1,279.67-1,918.49-1,005.08

Finding the Fourth Proportional to 1,279.67, 1,918.49 and 1,005.08

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Solution

The fourth proportional to 1,279.67, 1,918.49 and 1,005.08 is: 1,506.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279.67 : 1,918.49 = 1,005.08 : x
  2. Step 2: Convert to fraction form
    1,279.67/1,918.49 = 1,005.08/x
  3. Step 3: Cross multiply
    1,279.67x = 1,918.49 × 1,005.08
  4. Step 4: Simplify right side
    1,279.67x = 1,928,221.31
  5. Step 5: Solve for x
    x = 1,928,221.31/1,279.67
  6. Step 6: Final answer
    x = 1,506.82

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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.