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Finding the Fourth Proportional to 661,419.94, 913,210.30 and 443,954.78

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Solution

The fourth proportional to 661,419.94, 913,210.30 and 443,954.78 is: 612,960.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,419.94 : 913,210.30 = 443,954.78 : x
  2. Step 2: Convert to fraction form
    661,419.94/913,210.30 = 443,954.78/x
  3. Step 3: Cross multiply
    661,419.94x = 913,210.30 × 443,954.78
  4. Step 4: Simplify right side
    661,419.94x = 405,424,077,830.23
  5. Step 5: Solve for x
    x = 405,424,077,830.23/661,419.94
  6. Step 6: Final answer
    x = 612,960.17

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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.