Home / 2,928.57-4,390.80-1,079.45

Finding the Fourth Proportional to 2,928.57, 4,390.80 and 1,079.45

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Solution

The fourth proportional to 2,928.57, 4,390.80 and 1,079.45 is: 1,618.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,928.57 : 4,390.80 = 1,079.45 : x
  2. Step 2: Convert to fraction form
    2,928.57/4,390.80 = 1,079.45/x
  3. Step 3: Cross multiply
    2,928.57x = 4,390.80 × 1,079.45
  4. Step 4: Simplify right side
    2,928.57x = 4,739,627.11
  5. Step 5: Solve for x
    x = 4,739,627.11/2,928.57
  6. Step 6: Final answer
    x = 1,618.41

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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.