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Finding the Fourth Proportional to 489,383.58, 675,586.74 and 328,179.78

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Solution

The fourth proportional to 489,383.58, 675,586.74 and 328,179.78 is: 453,047.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,383.58 : 675,586.74 = 328,179.78 : x
  2. Step 2: Convert to fraction form
    489,383.58/675,586.74 = 328,179.78/x
  3. Step 3: Cross multiply
    489,383.58x = 675,586.74 × 328,179.78
  4. Step 4: Simplify right side
    489,383.58x = 221,713,907,704.12
  5. Step 5: Solve for x
    x = 221,713,907,704.12/489,383.58
  6. Step 6: Final answer
    x = 453,047.30

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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.