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Finding the Fourth Proportional to 640,556.37, 960,874.18 and 214,130.57

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Solution

The fourth proportional to 640,556.37, 960,874.18 and 214,130.57 is: 321,209.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,556.37 : 960,874.18 = 214,130.57 : x
  2. Step 2: Convert to fraction form
    640,556.37/960,874.18 = 214,130.57/x
  3. Step 3: Cross multiply
    640,556.37x = 960,874.18 × 214,130.57
  4. Step 4: Simplify right side
    640,556.37x = 205,752,530,521.99
  5. Step 5: Solve for x
    x = 205,752,530,521.99/640,556.37
  6. Step 6: Final answer
    x = 321,209.09

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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.