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Finding the Fourth Proportional to 965,654.64, 1,331,997.12 and 621,936

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Solution

The fourth proportional to 965,654.64, 1,331,997.12 and 621,936 is: 857,881.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    965,654.64 : 1,331,997.12 = 621,936 : x
  2. Step 2: Convert to fraction form
    965,654.64/1,331,997.12 = 621,936/x
  3. Step 3: Cross multiply
    965,654.64x = 1,331,997.12 × 621,936
  4. Step 4: Simplify right side
    965,654.64x = 828,416,960,824.32
  5. Step 5: Solve for x
    x = 828,416,960,824.32/965,654.64
  6. Step 6: Final answer
    x = 857,881.20

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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.