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Finding the Fourth Proportional to 719,390.85, 992,759.54 and 397,101.12

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Solution

The fourth proportional to 719,390.85, 992,759.54 and 397,101.12 is: 547,999.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,390.85 : 992,759.54 = 397,101.12 : x
  2. Step 2: Convert to fraction form
    719,390.85/992,759.54 = 397,101.12/x
  3. Step 3: Cross multiply
    719,390.85x = 992,759.54 × 397,101.12
  4. Step 4: Simplify right side
    719,390.85x = 394,225,923,239.18
  5. Step 5: Solve for x
    x = 394,225,923,239.18/719,390.85
  6. Step 6: Final answer
    x = 547,999.64

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Double scale
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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.