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Finding the Fourth Proportional to 686,186.96, 945,755.76 and 456,333.44

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Solution

The fourth proportional to 686,186.96, 945,755.76 and 456,333.44 is: 628,953.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    686,186.96 : 945,755.76 = 456,333.44 : x
  2. Step 2: Convert to fraction form
    686,186.96/945,755.76 = 456,333.44/x
  3. Step 3: Cross multiply
    686,186.96x = 945,755.76 × 456,333.44
  4. Step 4: Simplify right side
    686,186.96x = 431,579,979,360.61
  5. Step 5: Solve for x
    x = 431,579,979,360.61/686,186.96
  6. Step 6: Final answer
    x = 628,953.92

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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.