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Finding the Fourth Proportional to 515,801.36, 711,819.96 and 289,460.72

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Solution

The fourth proportional to 515,801.36, 711,819.96 and 289,460.72 is: 399,463.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,801.36 : 711,819.96 = 289,460.72 : x
  2. Step 2: Convert to fraction form
    515,801.36/711,819.96 = 289,460.72/x
  3. Step 3: Cross multiply
    515,801.36x = 711,819.96 × 289,460.72
  4. Step 4: Simplify right side
    515,801.36x = 206,043,918,131.97
  5. Step 5: Solve for x
    x = 206,043,918,131.97/515,801.36
  6. Step 6: Final answer
    x = 399,463.70

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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.