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Finding the Fourth Proportional to 519,987.69, 717,587.76 and 305,131.34

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Solution

The fourth proportional to 519,987.69, 717,587.76 and 305,131.34 is: 421,084.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,987.69 : 717,587.76 = 305,131.34 : x
  2. Step 2: Convert to fraction form
    519,987.69/717,587.76 = 305,131.34/x
  3. Step 3: Cross multiply
    519,987.69x = 717,587.76 × 305,131.34
  4. Step 4: Simplify right side
    519,987.69x = 218,958,511,188.46
  5. Step 5: Solve for x
    x = 218,958,511,188.46/519,987.69
  6. Step 6: Final answer
    x = 421,084.03

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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.