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Finding the Fourth Proportional to 4,871.92, 7,311.40 and 1,951.08

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Solution

The fourth proportional to 4,871.92, 7,311.40 and 1,951.08 is: 2,928.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,871.92 : 7,311.40 = 1,951.08 : x
  2. Step 2: Convert to fraction form
    4,871.92/7,311.40 = 1,951.08/x
  3. Step 3: Cross multiply
    4,871.92x = 7,311.40 × 1,951.08
  4. Step 4: Simplify right side
    4,871.92x = 14,265,126.31
  5. Step 5: Solve for x
    x = 14,265,126.31/4,871.92
  6. Step 6: Final answer
    x = 2,928.03

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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.