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Finding the Fourth Proportional to 2,928.42, 4,392.92 and 953.96

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Solution

The fourth proportional to 2,928.42, 4,392.92 and 953.96 is: 1,431.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,928.42 : 4,392.92 = 953.96 : x
  2. Step 2: Convert to fraction form
    2,928.42/4,392.92 = 953.96/x
  3. Step 3: Cross multiply
    2,928.42x = 4,392.92 × 953.96
  4. Step 4: Simplify right side
    2,928.42x = 4,190,669.73
  5. Step 5: Solve for x
    x = 4,190,669.73/2,928.42
  6. Step 6: Final answer
    x = 1,431.03

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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.