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Finding the Fourth Proportional to 628,031.20, 866,878.19 and 499,198.27

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Solution

The fourth proportional to 628,031.20, 866,878.19 and 499,198.27 is: 689,048.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,031.20 : 866,878.19 = 499,198.27 : x
  2. Step 2: Convert to fraction form
    628,031.20/866,878.19 = 499,198.27/x
  3. Step 3: Cross multiply
    628,031.20x = 866,878.19 × 499,198.27
  4. Step 4: Simplify right side
    628,031.20x = 432,744,092,748.73
  5. Step 5: Solve for x
    x = 432,744,092,748.73/628,031.20
  6. Step 6: Final answer
    x = 689,048.72

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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.