Home / 1,485.19-2,228.31-663.39

Finding the Fourth Proportional to 1,485.19, 2,228.31 and 663.39

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Solution

The fourth proportional to 1,485.19, 2,228.31 and 663.39 is: 995.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,485.19 : 2,228.31 = 663.39 : x
  2. Step 2: Convert to fraction form
    1,485.19/2,228.31 = 663.39/x
  3. Step 3: Cross multiply
    1,485.19x = 2,228.31 × 663.39
  4. Step 4: Simplify right side
    1,485.19x = 1,478,238.57
  5. Step 5: Solve for x
    x = 1,478,238.57/1,485.19
  6. Step 6: Final answer
    x = 995.32

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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.