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Finding the Fourth Proportional to 411,311.20, 616,675.20 and 186,779.20

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Solution

The fourth proportional to 411,311.20, 616,675.20 and 186,779.20 is: 280,036.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    411,311.20 : 616,675.20 = 186,779.20 : x
  2. Step 2: Convert to fraction form
    411,311.20/616,675.20 = 186,779.20/x
  3. Step 3: Cross multiply
    411,311.20x = 616,675.20 × 186,779.20
  4. Step 4: Simplify right side
    411,311.20x = 115,182,100,515.84
  5. Step 5: Solve for x
    x = 115,182,100,515.84/411,311.20
  6. Step 6: Final answer
    x = 280,036.38

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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.