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Finding the Fourth Proportional to 2,788, 4,183.92 and 964

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Solution

The fourth proportional to 2,788, 4,183.92 and 964 is: 1,446.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,788 : 4,183.92 = 964 : x
  2. Step 2: Convert to fraction form
    2,788/4,183.92 = 964/x
  3. Step 3: Cross multiply
    2,788x = 4,183.92 × 964
  4. Step 4: Simplify right side
    2,788x = 4,033,298.88
  5. Step 5: Solve for x
    x = 4,033,298.88/2,788
  6. Step 6: Final answer
    x = 1,446.66

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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.