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Finding the Fourth Proportional to 512,453.68, 769,153.02 and 259,911.40

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Solution

The fourth proportional to 512,453.68, 769,153.02 and 259,911.40 is: 390,106.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,453.68 : 769,153.02 = 259,911.40 : x
  2. Step 2: Convert to fraction form
    512,453.68/769,153.02 = 259,911.40/x
  3. Step 3: Cross multiply
    512,453.68x = 769,153.02 × 259,911.40
  4. Step 4: Simplify right side
    512,453.68x = 199,911,638,242.43
  5. Step 5: Solve for x
    x = 199,911,638,242.43/512,453.68
  6. Step 6: Final answer
    x = 390,106.75

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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.