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Finding the Fourth Proportional to 628,031.70, 866,878.88 and 499,198.77

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Solution

The fourth proportional to 628,031.70, 866,878.88 and 499,198.77 is: 689,049.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,031.70 : 866,878.88 = 499,198.77 : x
  2. Step 2: Convert to fraction form
    628,031.70/866,878.88 = 499,198.77/x
  3. Step 3: Cross multiply
    628,031.70x = 866,878.88 × 499,198.77
  4. Step 4: Simplify right side
    628,031.70x = 432,744,870,634.98
  5. Step 5: Solve for x
    x = 432,744,870,634.98/628,031.70
  6. Step 6: Final answer
    x = 689,049.41

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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.