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Finding the Fourth Proportional to 326,638.40, 489,957.60 and 105,044.80

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Solution

The fourth proportional to 326,638.40, 489,957.60 and 105,044.80 is: 157,567.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,638.40 : 489,957.60 = 105,044.80 : x
  2. Step 2: Convert to fraction form
    326,638.40/489,957.60 = 105,044.80/x
  3. Step 3: Cross multiply
    326,638.40x = 489,957.60 × 105,044.80
  4. Step 4: Simplify right side
    326,638.40x = 51,467,498,100.48
  5. Step 5: Solve for x
    x = 51,467,498,100.48/326,638.40
  6. Step 6: Final answer
    x = 157,567.20

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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.