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Finding the Fourth Proportional to 2,928.81, 4,392.81 and 1,079.93

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Solution

The fourth proportional to 2,928.81, 4,392.81 and 1,079.93 is: 1,619.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,928.81 : 4,392.81 = 1,079.93 : x
  2. Step 2: Convert to fraction form
    2,928.81/4,392.81 = 1,079.93/x
  3. Step 3: Cross multiply
    2,928.81x = 4,392.81 × 1,079.93
  4. Step 4: Simplify right side
    2,928.81x = 4,743,905.34
  5. Step 5: Solve for x
    x = 4,743,905.34/2,928.81
  6. Step 6: Final answer
    x = 1,619.74

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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.