Home / 2,928.80-4,394.02-1,285.72

Finding the Fourth Proportional to 2,928.80, 4,394.02 and 1,285.72

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Solution

The fourth proportional to 2,928.80, 4,394.02 and 1,285.72 is: 1,928.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,928.80 : 4,394.02 = 1,285.72 : x
  2. Step 2: Convert to fraction form
    2,928.80/4,394.02 = 1,285.72/x
  3. Step 3: Cross multiply
    2,928.80x = 4,394.02 × 1,285.72
  4. Step 4: Simplify right side
    2,928.80x = 5,649,479.39
  5. Step 5: Solve for x
    x = 5,649,479.39/2,928.80
  6. Step 6: Final answer
    x = 1,928.94

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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.