Home / 1,953.15-2,928.35-720.23

Finding the Fourth Proportional to 1,953.15, 2,928.35 and 720.23

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Solution

The fourth proportional to 1,953.15, 2,928.35 and 720.23 is: 1,079.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,953.15 : 2,928.35 = 720.23 : x
  2. Step 2: Convert to fraction form
    1,953.15/2,928.35 = 720.23/x
  3. Step 3: Cross multiply
    1,953.15x = 2,928.35 × 720.23
  4. Step 4: Simplify right side
    1,953.15x = 2,109,085.52
  5. Step 5: Solve for x
    x = 2,109,085.52/1,953.15
  6. Step 6: Final answer
    x = 1,079.84

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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.