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Finding the Fourth Proportional to 489,128.74, 675,053.88 and 325,776.22

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Solution

The fourth proportional to 489,128.74, 675,053.88 and 325,776.22 is: 449,608.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,128.74 : 675,053.88 = 325,776.22 : x
  2. Step 2: Convert to fraction form
    489,128.74/675,053.88 = 325,776.22/x
  3. Step 3: Cross multiply
    489,128.74x = 675,053.88 × 325,776.22
  4. Step 4: Simplify right side
    489,128.74x = 219,916,501,322.73
  5. Step 5: Solve for x
    x = 219,916,501,322.73/489,128.74
  6. Step 6: Final answer
    x = 449,608.63

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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.