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Finding the Fourth Proportional to 514,866.60, 771,839.10 and 199,218.60

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Solution

The fourth proportional to 514,866.60, 771,839.10 and 199,218.60 is: 298,649.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    514,866.60 : 771,839.10 = 199,218.60 : x
  2. Step 2: Convert to fraction form
    514,866.60/771,839.10 = 199,218.60/x
  3. Step 3: Cross multiply
    514,866.60x = 771,839.10 × 199,218.60
  4. Step 4: Simplify right side
    514,866.60x = 153,764,704,927.26
  5. Step 5: Solve for x
    x = 153,764,704,927.26/514,866.60
  6. Step 6: Final answer
    x = 298,649.60

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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.