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Finding the Fourth Proportional to 812,567.76, 1,219,059 and 515,161.68

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Solution

The fourth proportional to 812,567.76, 1,219,059 and 515,161.68 is: 772,873.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    812,567.76 : 1,219,059 = 515,161.68 : x
  2. Step 2: Convert to fraction form
    812,567.76/1,219,059 = 515,161.68/x
  3. Step 3: Cross multiply
    812,567.76x = 1,219,059 × 515,161.68
  4. Step 4: Simplify right side
    812,567.76x = 628,012,482,459.12
  5. Step 5: Solve for x
    x = 628,012,482,459.12/812,567.76
  6. Step 6: Final answer
    x = 772,873.98

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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.