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Finding the Fourth Proportional to 719,423.74, 992,804.96 and 397,134.06

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Solution

The fourth proportional to 719,423.74, 992,804.96 and 397,134.06 is: 548,045.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,423.74 : 992,804.96 = 397,134.06 : x
  2. Step 2: Convert to fraction form
    719,423.74/992,804.96 = 397,134.06/x
  3. Step 3: Cross multiply
    719,423.74x = 992,804.96 × 397,134.06
  4. Step 4: Simplify right side
    719,423.74x = 394,276,664,552.94
  5. Step 5: Solve for x
    x = 394,276,664,552.94/719,423.74
  6. Step 6: Final answer
    x = 548,045.11

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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.