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Finding the Fourth Proportional to 719,440.46, 992,828 and 397,150.78

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Solution

The fourth proportional to 719,440.46, 992,828 and 397,150.78 is: 548,068.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,440.46 : 992,828 = 397,150.78 : x
  2. Step 2: Convert to fraction form
    719,440.46/992,828 = 397,150.78/x
  3. Step 3: Cross multiply
    719,440.46x = 992,828 × 397,150.78
  4. Step 4: Simplify right side
    719,440.46x = 394,302,414,605.84
  5. Step 5: Solve for x
    x = 394,302,414,605.84/719,440.46
  6. Step 6: Final answer
    x = 548,068.17

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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.