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Finding the Fourth Proportional to 665,333.41, 918,168.87 and 378,854.64

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Solution

The fourth proportional to 665,333.41, 918,168.87 and 378,854.64 is: 522,824.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,333.41 : 918,168.87 = 378,854.64 : x
  2. Step 2: Convert to fraction form
    665,333.41/918,168.87 = 378,854.64/x
  3. Step 3: Cross multiply
    665,333.41x = 918,168.87 × 378,854.64
  4. Step 4: Simplify right side
    665,333.41x = 347,852,536,703.06
  5. Step 5: Solve for x
    x = 347,852,536,703.06/665,333.41
  6. Step 6: Final answer
    x = 522,824.39

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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.