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Finding the Fourth Proportional to 2,866.80, 4,300.08 and 919.44

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Solution

The fourth proportional to 2,866.80, 4,300.08 and 919.44 is: 1,379.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,866.80 : 4,300.08 = 919.44 : x
  2. Step 2: Convert to fraction form
    2,866.80/4,300.08 = 919.44/x
  3. Step 3: Cross multiply
    2,866.80x = 4,300.08 × 919.44
  4. Step 4: Simplify right side
    2,866.80x = 3,953,665.56
  5. Step 5: Solve for x
    x = 3,953,665.56/2,866.80
  6. Step 6: Final answer
    x = 1,379.12

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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.