Home / 1,079.06-1,618.87-385.79

Finding the Fourth Proportional to 1,079.06, 1,618.87 and 385.79

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Solution

The fourth proportional to 1,079.06, 1,618.87 and 385.79 is: 578.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,079.06 : 1,618.87 = 385.79 : x
  2. Step 2: Convert to fraction form
    1,079.06/1,618.87 = 385.79/x
  3. Step 3: Cross multiply
    1,079.06x = 1,618.87 × 385.79
  4. Step 4: Simplify right side
    1,079.06x = 624,546.94
  5. Step 5: Solve for x
    x = 624,546.94/1,079.06
  6. Step 6: Final answer
    x = 578.79

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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.