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Finding the Fourth Proportional to 343,974.90, 515,789.55 and 156,774.90

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Solution

The fourth proportional to 343,974.90, 515,789.55 and 156,774.90 is: 235,083.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,974.90 : 515,789.55 = 156,774.90 : x
  2. Step 2: Convert to fraction form
    343,974.90/515,789.55 = 156,774.90/x
  3. Step 3: Cross multiply
    343,974.90x = 515,789.55 × 156,774.90
  4. Step 4: Simplify right side
    343,974.90x = 80,862,855,122.30
  5. Step 5: Solve for x
    x = 80,862,855,122.30/343,974.90
  6. Step 6: Final answer
    x = 235,083.59

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1.5x scale

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.