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Finding the Fourth Proportional to 283,636.12, 391,415.88 and 156,311.88

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Solution

The fourth proportional to 283,636.12, 391,415.88 and 156,311.88 is: 215,709.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,636.12 : 391,415.88 = 156,311.88 : x
  2. Step 2: Convert to fraction form
    283,636.12/391,415.88 = 156,311.88/x
  3. Step 3: Cross multiply
    283,636.12x = 391,415.88 × 156,311.88
  4. Step 4: Simplify right side
    283,636.12x = 61,182,952,064.65
  5. Step 5: Solve for x
    x = 61,182,952,064.65/283,636.12
  6. Step 6: Final answer
    x = 215,709.31

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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.