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Finding the Fourth Proportional to 519,216.75, 778,825.13 and 145,239.75

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Solution

The fourth proportional to 519,216.75, 778,825.13 and 145,239.75 is: 217,859.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,216.75 : 778,825.13 = 145,239.75 : x
  2. Step 2: Convert to fraction form
    519,216.75/778,825.13 = 145,239.75/x
  3. Step 3: Cross multiply
    519,216.75x = 778,825.13 × 145,239.75
  4. Step 4: Simplify right side
    519,216.75x = 113,116,366,448.72
  5. Step 5: Solve for x
    x = 113,116,366,448.72/519,216.75
  6. Step 6: Final answer
    x = 217,859.63

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Double scale
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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.