Home / 1,485.05-2,227.52-389.45

Finding the Fourth Proportional to 1,485.05, 2,227.52 and 389.45

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Solution

The fourth proportional to 1,485.05, 2,227.52 and 389.45 is: 584.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,485.05 : 2,227.52 = 389.45 : x
  2. Step 2: Convert to fraction form
    1,485.05/2,227.52 = 389.45/x
  3. Step 3: Cross multiply
    1,485.05x = 2,227.52 × 389.45
  4. Step 4: Simplify right side
    1,485.05x = 867,494.58
  5. Step 5: Solve for x
    x = 867,494.58/1,485.05
  6. Step 6: Final answer
    x = 584.15

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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.