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Finding the Fourth Proportional to 661,800.66, 913,352.40 and 389,953.32

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Solution

The fourth proportional to 661,800.66, 913,352.40 and 389,953.32 is: 538,175.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,800.66 : 913,352.40 = 389,953.32 : x
  2. Step 2: Convert to fraction form
    661,800.66/913,352.40 = 389,953.32/x
  3. Step 3: Cross multiply
    661,800.66x = 913,352.40 × 389,953.32
  4. Step 4: Simplify right side
    661,800.66x = 356,164,800,709.97
  5. Step 5: Solve for x
    x = 356,164,800,709.97/661,800.66
  6. Step 6: Final answer
    x = 538,175.35

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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.