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Finding the Fourth Proportional to 664,343.07, 916,321.11 and 443,469.13

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Solution

The fourth proportional to 664,343.07, 916,321.11 and 443,469.13 is: 611,672.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,343.07 : 916,321.11 = 443,469.13 : x
  2. Step 2: Convert to fraction form
    664,343.07/916,321.11 = 443,469.13/x
  3. Step 3: Cross multiply
    664,343.07x = 916,321.11 × 443,469.13
  4. Step 4: Simplify right side
    664,343.07x = 406,360,121,498.52
  5. Step 5: Solve for x
    x = 406,360,121,498.52/664,343.07
  6. Step 6: Final answer
    x = 611,672.10

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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.