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Finding the Fourth Proportional to 615,910.80, 923,002.20 and 489,766.80

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Solution

The fourth proportional to 615,910.80, 923,002.20 and 489,766.80 is: 733,963.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,910.80 : 923,002.20 = 489,766.80 : x
  2. Step 2: Convert to fraction form
    615,910.80/923,002.20 = 489,766.80/x
  3. Step 3: Cross multiply
    615,910.80x = 923,002.20 × 489,766.80
  4. Step 4: Simplify right side
    615,910.80x = 452,055,833,886.96
  5. Step 5: Solve for x
    x = 452,055,833,886.96/615,910.80
  6. Step 6: Final answer
    x = 733,963.15

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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.