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Finding the Fourth Proportional to 515,137.28, 711,300.48 and 345,516.80

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Solution

The fourth proportional to 515,137.28, 711,300.48 and 345,516.80 is: 477,088.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,137.28 : 711,300.48 = 345,516.80 : x
  2. Step 2: Convert to fraction form
    515,137.28/711,300.48 = 345,516.80/x
  3. Step 3: Cross multiply
    515,137.28x = 711,300.48 × 345,516.80
  4. Step 4: Simplify right side
    515,137.28x = 245,766,265,688.06
  5. Step 5: Solve for x
    x = 245,766,265,688.06/515,137.28
  6. Step 6: Final answer
    x = 477,088.88

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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.