Home / 1,279.50-1,918.13-549.56

Finding the Fourth Proportional to 1,279.50, 1,918.13 and 549.56

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Solution

The fourth proportional to 1,279.50, 1,918.13 and 549.56 is: 823.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279.50 : 1,918.13 = 549.56 : x
  2. Step 2: Convert to fraction form
    1,279.50/1,918.13 = 549.56/x
  3. Step 3: Cross multiply
    1,279.50x = 1,918.13 × 549.56
  4. Step 4: Simplify right side
    1,279.50x = 1,054,115.18
  5. Step 5: Solve for x
    x = 1,054,115.18/1,279.50
  6. Step 6: Final answer
    x = 823.85

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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.