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Finding the Fourth Proportional to 411,209.70, 617,851.35 and 261,521.70

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Solution

The fourth proportional to 411,209.70, 617,851.35 and 261,521.70 is: 392,941.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    411,209.70 : 617,851.35 = 261,521.70 : x
  2. Step 2: Convert to fraction form
    411,209.70/617,851.35 = 261,521.70/x
  3. Step 3: Cross multiply
    411,209.70x = 617,851.35 × 261,521.70
  4. Step 4: Simplify right side
    411,209.70x = 161,581,535,399.30
  5. Step 5: Solve for x
    x = 161,581,535,399.30/411,209.70
  6. Step 6: Final answer
    x = 392,941.94

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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.