Home / 1,953.56-2,928.65-720.33

Finding the Fourth Proportional to 1,953.56, 2,928.65 and 720.33

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Solution

The fourth proportional to 1,953.56, 2,928.65 and 720.33 is: 1,079.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,953.56 : 2,928.65 = 720.33 : x
  2. Step 2: Convert to fraction form
    1,953.56/2,928.65 = 720.33/x
  3. Step 3: Cross multiply
    1,953.56x = 2,928.65 × 720.33
  4. Step 4: Simplify right side
    1,953.56x = 2,109,590.85
  5. Step 5: Solve for x
    x = 2,109,590.85/1,953.56
  6. Step 6: Final answer
    x = 1,079.87

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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.