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Finding the Fourth Proportional to 615,908.80, 922,999.20 and 489,764.80

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Solution

The fourth proportional to 615,908.80, 922,999.20 and 489,764.80 is: 733,960.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,908.80 : 922,999.20 = 489,764.80 : x
  2. Step 2: Convert to fraction form
    615,908.80/922,999.20 = 489,764.80/x
  3. Step 3: Cross multiply
    615,908.80x = 922,999.20 × 489,764.80
  4. Step 4: Simplify right side
    615,908.80x = 452,052,518,588.16
  5. Step 5: Solve for x
    x = 452,052,518,588.16/615,908.80
  6. Step 6: Final answer
    x = 733,960.16

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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.