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Finding the Fourth Proportional to 439,728.40, 659,592.60 and 262,435.60

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Solution

The fourth proportional to 439,728.40, 659,592.60 and 262,435.60 is: 393,653.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,728.40 : 659,592.60 = 262,435.60 : x
  2. Step 2: Convert to fraction form
    439,728.40/659,592.60 = 262,435.60/x
  3. Step 3: Cross multiply
    439,728.40x = 659,592.60 × 262,435.60
  4. Step 4: Simplify right side
    439,728.40x = 173,100,579,736.56
  5. Step 5: Solve for x
    x = 173,100,579,736.56/439,728.40
  6. Step 6: Final answer
    x = 393,653.40

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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.