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Finding the Fourth Proportional to 4,788.79, 7,178.92 and 1,866.43

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Solution

The fourth proportional to 4,788.79, 7,178.92 and 1,866.43 is: 2,797.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,788.79 : 7,178.92 = 1,866.43 : x
  2. Step 2: Convert to fraction form
    4,788.79/7,178.92 = 1,866.43/x
  3. Step 3: Cross multiply
    4,788.79x = 7,178.92 × 1,866.43
  4. Step 4: Simplify right side
    4,788.79x = 13,398,951.66
  5. Step 5: Solve for x
    x = 13,398,951.66/4,788.79
  6. Step 6: Final answer
    x = 2,797.98

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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.