Home / 1,485.17-2,227.56-389.55

Finding the Fourth Proportional to 1,485.17, 2,227.56 and 389.55

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Solution

The fourth proportional to 1,485.17, 2,227.56 and 389.55 is: 584.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,485.17 : 2,227.56 = 389.55 : x
  2. Step 2: Convert to fraction form
    1,485.17/2,227.56 = 389.55/x
  3. Step 3: Cross multiply
    1,485.17x = 2,227.56 × 389.55
  4. Step 4: Simplify right side
    1,485.17x = 867,736.18
  5. Step 5: Solve for x
    x = 867,736.18/1,485.17
  6. Step 6: Final answer
    x = 584.27

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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.