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Finding the Fourth Proportional to 489,724.60, 734,586.90 and 279,772.60

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Solution

The fourth proportional to 489,724.60, 734,586.90 and 279,772.60 is: 419,658.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,724.60 : 734,586.90 = 279,772.60 : x
  2. Step 2: Convert to fraction form
    489,724.60/734,586.90 = 279,772.60/x
  3. Step 3: Cross multiply
    489,724.60x = 734,586.90 × 279,772.60
  4. Step 4: Simplify right side
    489,724.60x = 205,517,286,938.94
  5. Step 5: Solve for x
    x = 205,517,286,938.94/489,724.60
  6. Step 6: Final answer
    x = 419,658.90

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Similar ratio
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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.