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Finding the Fourth Proportional to 2,898.82, 4,348.40 and 819

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Solution

The fourth proportional to 2,898.82, 4,348.40 and 819 is: 1,228.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,898.82 : 4,348.40 = 819 : x
  2. Step 2: Convert to fraction form
    2,898.82/4,348.40 = 819/x
  3. Step 3: Cross multiply
    2,898.82x = 4,348.40 × 819
  4. Step 4: Simplify right side
    2,898.82x = 3,561,339.60
  5. Step 5: Solve for x
    x = 3,561,339.60/2,898.82
  6. Step 6: Final answer
    x = 1,228.55

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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.