Home / 1,079.27-1,618.50-385.75

Finding the Fourth Proportional to 1,079.27, 1,618.50 and 385.75

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Solution

The fourth proportional to 1,079.27, 1,618.50 and 385.75 is: 578.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,079.27 : 1,618.50 = 385.75 : x
  2. Step 2: Convert to fraction form
    1,079.27/1,618.50 = 385.75/x
  3. Step 3: Cross multiply
    1,079.27x = 1,618.50 × 385.75
  4. Step 4: Simplify right side
    1,079.27x = 624,336.38
  5. Step 5: Solve for x
    x = 624,336.38/1,079.27
  6. Step 6: Final answer
    x = 578.48

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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.