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Finding the Fourth Proportional to 489,284.65, 675,215.21 and 274,436.20

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Solution

The fourth proportional to 489,284.65, 675,215.21 and 274,436.20 is: 378,723.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,284.65 : 675,215.21 = 274,436.20 : x
  2. Step 2: Convert to fraction form
    489,284.65/675,215.21 = 274,436.20/x
  3. Step 3: Cross multiply
    489,284.65x = 675,215.21 × 274,436.20
  4. Step 4: Simplify right side
    489,284.65x = 185,303,496,414.60
  5. Step 5: Solve for x
    x = 185,303,496,414.60/489,284.65
  6. Step 6: Final answer
    x = 378,723.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.