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Finding the Fourth Proportional to 1,902.80, 2,853.12 and 1,511.65

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Solution

The fourth proportional to 1,902.80, 2,853.12 and 1,511.65 is: 2,266.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,902.80 : 2,853.12 = 1,511.65 : x
  2. Step 2: Convert to fraction form
    1,902.80/2,853.12 = 1,511.65/x
  3. Step 3: Cross multiply
    1,902.80x = 2,853.12 × 1,511.65
  4. Step 4: Simplify right side
    1,902.80x = 4,312,924.07
  5. Step 5: Solve for x
    x = 4,312,924.07/1,902.80
  6. Step 6: Final answer
    x = 2,266.62

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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.