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Finding the Fourth Proportional to 391,037.91, 539,630.42 and 212,189.91

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Solution

The fourth proportional to 391,037.91, 539,630.42 and 212,189.91 is: 292,821.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,037.91 : 539,630.42 = 212,189.91 : x
  2. Step 2: Convert to fraction form
    391,037.91/539,630.42 = 212,189.91/x
  3. Step 3: Cross multiply
    391,037.91x = 539,630.42 × 212,189.91
  4. Step 4: Simplify right side
    391,037.91x = 114,504,129,192.11
  5. Step 5: Solve for x
    x = 114,504,129,192.11/391,037.91
  6. Step 6: Final answer
    x = 292,821.04

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.