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Finding the Fourth Proportional to 639,065.90, 957,432.45 and 520,093.10

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Solution

The fourth proportional to 639,065.90, 957,432.45 and 520,093.10 is: 779,190.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,065.90 : 957,432.45 = 520,093.10 : x
  2. Step 2: Convert to fraction form
    639,065.90/957,432.45 = 520,093.10/x
  3. Step 3: Cross multiply
    639,065.90x = 957,432.45 × 520,093.10
  4. Step 4: Simplify right side
    639,065.90x = 497,954,010,961.10
  5. Step 5: Solve for x
    x = 497,954,010,961.10/639,065.90
  6. Step 6: Final answer
    x = 779,190.39

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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.