Home / 1,953.37-2,928.44-720.55

Finding the Fourth Proportional to 1,953.37, 2,928.44 and 720.55

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Solution

The fourth proportional to 1,953.37, 2,928.44 and 720.55 is: 1,080.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,953.37 : 2,928.44 = 720.55 : x
  2. Step 2: Convert to fraction form
    1,953.37/2,928.44 = 720.55/x
  3. Step 3: Cross multiply
    1,953.37x = 2,928.44 × 720.55
  4. Step 4: Simplify right side
    1,953.37x = 2,110,083.84
  5. Step 5: Solve for x
    x = 2,110,083.84/1,953.37
  6. Step 6: Final answer
    x = 1,080.23

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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.