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Finding the Fourth Proportional to 4,702.80, 7,048.80 and 1,928.10

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Solution

The fourth proportional to 4,702.80, 7,048.80 and 1,928.10 is: 2,889.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,702.80 : 7,048.80 = 1,928.10 : x
  2. Step 2: Convert to fraction form
    4,702.80/7,048.80 = 1,928.10/x
  3. Step 3: Cross multiply
    4,702.80x = 7,048.80 × 1,928.10
  4. Step 4: Simplify right side
    4,702.80x = 13,590,791.28
  5. Step 5: Solve for x
    x = 13,590,791.28/4,702.80
  6. Step 6: Final answer
    x = 2,889.94

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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.