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Finding the Fourth Proportional to 405,076.80, 607,615.20 and 326,344.80

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Solution

The fourth proportional to 405,076.80, 607,615.20 and 326,344.80 is: 489,517.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,076.80 : 607,615.20 = 326,344.80 : x
  2. Step 2: Convert to fraction form
    405,076.80/607,615.20 = 326,344.80/x
  3. Step 3: Cross multiply
    405,076.80x = 607,615.20 × 326,344.80
  4. Step 4: Simplify right side
    405,076.80x = 198,292,060,920.96
  5. Step 5: Solve for x
    x = 198,292,060,920.96/405,076.80
  6. Step 6: Final answer
    x = 489,517.20

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1.5x scale

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.