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Finding the Fourth Proportional to 505,915.89, 698,136.52 and 279,546.81

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Solution

The fourth proportional to 505,915.89, 698,136.52 and 279,546.81 is: 385,759.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,915.89 : 698,136.52 = 279,546.81 : x
  2. Step 2: Convert to fraction form
    505,915.89/698,136.52 = 279,546.81/x
  3. Step 3: Cross multiply
    505,915.89x = 698,136.52 × 279,546.81
  4. Step 4: Simplify right side
    505,915.89x = 195,161,837,110.50
  5. Step 5: Solve for x
    x = 195,161,837,110.50/505,915.89
  6. Step 6: Final answer
    x = 385,759.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.