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Finding the Fourth Proportional to 499,611.40, 749,417.10 and 447,123.40

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Solution

The fourth proportional to 499,611.40, 749,417.10 and 447,123.40 is: 670,685.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,611.40 : 749,417.10 = 447,123.40 : x
  2. Step 2: Convert to fraction form
    499,611.40/749,417.10 = 447,123.40/x
  3. Step 3: Cross multiply
    499,611.40x = 749,417.10 × 447,123.40
  4. Step 4: Simplify right side
    499,611.40x = 335,081,921,770.14
  5. Step 5: Solve for x
    x = 335,081,921,770.14/499,611.40
  6. Step 6: Final answer
    x = 670,685.10

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Similar ratio
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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.