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Finding the Fourth Proportional to 1,889.12, 2,833.66 and 778.52

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Solution

The fourth proportional to 1,889.12, 2,833.66 and 778.52 is: 1,167.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,889.12 : 2,833.66 = 778.52 : x
  2. Step 2: Convert to fraction form
    1,889.12/2,833.66 = 778.52/x
  3. Step 3: Cross multiply
    1,889.12x = 2,833.66 × 778.52
  4. Step 4: Simplify right side
    1,889.12x = 2,206,060.98
  5. Step 5: Solve for x
    x = 2,206,060.98/1,889.12
  6. Step 6: Final answer
    x = 1,167.77

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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.