Home / 1,279.63-1,919.67-549.18

Finding the Fourth Proportional to 1,279.63, 1,919.67 and 549.18

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Solution

The fourth proportional to 1,279.63, 1,919.67 and 549.18 is: 823.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279.63 : 1,919.67 = 549.18 : x
  2. Step 2: Convert to fraction form
    1,279.63/1,919.67 = 549.18/x
  3. Step 3: Cross multiply
    1,279.63x = 1,919.67 × 549.18
  4. Step 4: Simplify right side
    1,279.63x = 1,054,242.31
  5. Step 5: Solve for x
    x = 1,054,242.31/1,279.63
  6. Step 6: Final answer
    x = 823.86

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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.