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Finding the Fourth Proportional to 515,528.32, 773,512.80 and 279,038.56

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Solution

The fourth proportional to 515,528.32, 773,512.80 and 279,038.56 is: 418,677.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,528.32 : 773,512.80 = 279,038.56 : x
  2. Step 2: Convert to fraction form
    515,528.32/773,512.80 = 279,038.56/x
  3. Step 3: Cross multiply
    515,528.32x = 773,512.80 × 279,038.56
  4. Step 4: Simplify right side
    515,528.32x = 215,839,897,853.57
  5. Step 5: Solve for x
    x = 215,839,897,853.57/515,528.32
  6. Step 6: Final answer
    x = 418,677.09

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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.