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Finding the Fourth Proportional to 719,513.78, 992,930.28 and 397,224.40

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Solution

The fourth proportional to 719,513.78, 992,930.28 and 397,224.40 is: 548,170.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,513.78 : 992,930.28 = 397,224.40 : x
  2. Step 2: Convert to fraction form
    719,513.78/992,930.28 = 397,224.40/x
  3. Step 3: Cross multiply
    719,513.78x = 992,930.28 × 397,224.40
  4. Step 4: Simplify right side
    719,513.78x = 394,416,127,764.06
  5. Step 5: Solve for x
    x = 394,416,127,764.06/719,513.78
  6. Step 6: Final answer
    x = 548,170.36

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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.