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Finding the Fourth Proportional to 719,362.18, 992,719.86 and 397,072.36

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Solution

The fourth proportional to 719,362.18, 992,719.86 and 397,072.36 is: 547,959.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,362.18 : 992,719.86 = 397,072.36 : x
  2. Step 2: Convert to fraction form
    719,362.18/992,719.86 = 397,072.36/x
  3. Step 3: Cross multiply
    719,362.18x = 992,719.86 × 397,072.36
  4. Step 4: Simplify right side
    719,362.18x = 394,181,617,629.07
  5. Step 5: Solve for x
    x = 394,181,617,629.07/719,362.18
  6. Step 6: Final answer
    x = 547,959.89

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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.