Home / 1,279.35-1,919.70-549.54

Finding the Fourth Proportional to 1,279.35, 1,919.70 and 549.54

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Solution

The fourth proportional to 1,279.35, 1,919.70 and 549.54 is: 824.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279.35 : 1,919.70 = 549.54 : x
  2. Step 2: Convert to fraction form
    1,279.35/1,919.70 = 549.54/x
  3. Step 3: Cross multiply
    1,279.35x = 1,919.70 × 549.54
  4. Step 4: Simplify right side
    1,279.35x = 1,054,951.94
  5. Step 5: Solve for x
    x = 1,054,951.94/1,279.35
  6. Step 6: Final answer
    x = 824.60

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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.