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Finding the Fourth Proportional to 4,288.80, 6,418.80 and 2,992.80

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Solution

The fourth proportional to 4,288.80, 6,418.80 and 2,992.80 is: 4,479.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,288.80 : 6,418.80 = 2,992.80 : x
  2. Step 2: Convert to fraction form
    4,288.80/6,418.80 = 2,992.80/x
  3. Step 3: Cross multiply
    4,288.80x = 6,418.80 × 2,992.80
  4. Step 4: Simplify right side
    4,288.80x = 19,210,184.64
  5. Step 5: Solve for x
    x = 19,210,184.64/4,288.80
  6. Step 6: Final answer
    x = 4,479.15

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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.