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Finding the Fourth Proportional to 489,760.98, 675,647.37 and 328,447.86

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Solution

The fourth proportional to 489,760.98, 675,647.37 and 328,447.86 is: 453,108.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,760.98 : 675,647.37 = 328,447.86 : x
  2. Step 2: Convert to fraction form
    489,760.98/675,647.37 = 328,447.86/x
  3. Step 3: Cross multiply
    489,760.98x = 675,647.37 × 328,447.86
  4. Step 4: Simplify right side
    489,760.98x = 221,914,932,791.13
  5. Step 5: Solve for x
    x = 221,914,932,791.13/489,760.98
  6. Step 6: Final answer
    x = 453,108.64

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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.