Home / 1,485.19-2,227.69-389.55

Finding the Fourth Proportional to 1,485.19, 2,227.69 and 389.55

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Solution

The fourth proportional to 1,485.19, 2,227.69 and 389.55 is: 584.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,485.19 : 2,227.69 = 389.55 : x
  2. Step 2: Convert to fraction form
    1,485.19/2,227.69 = 389.55/x
  3. Step 3: Cross multiply
    1,485.19x = 2,227.69 × 389.55
  4. Step 4: Simplify right side
    1,485.19x = 867,785.50
  5. Step 5: Solve for x
    x = 867,785.50/1,485.19
  6. Step 6: Final answer
    x = 584.29

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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.