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Finding the Fourth Proportional to 1,857.26, 2,785.88 and 489.26

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Solution

The fourth proportional to 1,857.26, 2,785.88 and 489.26 is: 733.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,857.26 : 2,785.88 = 489.26 : x
  2. Step 2: Convert to fraction form
    1,857.26/2,785.88 = 489.26/x
  3. Step 3: Cross multiply
    1,857.26x = 2,785.88 × 489.26
  4. Step 4: Simplify right side
    1,857.26x = 1,363,019.65
  5. Step 5: Solve for x
    x = 1,363,019.65/1,857.26
  6. Step 6: Final answer
    x = 733.89

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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.