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Finding the Fourth Proportional to 719,505.99, 992,918.25 and 397,216.71

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Solution

The fourth proportional to 719,505.99, 992,918.25 and 397,216.71 is: 548,159.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,505.99 : 992,918.25 = 397,216.71 : x
  2. Step 2: Convert to fraction form
    719,505.99/992,918.25 = 397,216.71/x
  3. Step 3: Cross multiply
    719,505.99x = 992,918.25 × 397,216.71
  4. Step 4: Simplify right side
    719,505.99x = 394,403,720,563.96
  5. Step 5: Solve for x
    x = 394,403,720,563.96/719,505.99
  6. Step 6: Final answer
    x = 548,159.05

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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.