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Finding the Fourth Proportional to 719,071.70, 992,289.93 and 396,777.60

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Solution

The fourth proportional to 719,071.70, 992,289.93 and 396,777.60 is: 547,537.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,071.70 : 992,289.93 = 396,777.60 : x
  2. Step 2: Convert to fraction form
    719,071.70/992,289.93 = 396,777.60/x
  3. Step 3: Cross multiply
    719,071.70x = 992,289.93 × 396,777.60
  4. Step 4: Simplify right side
    719,071.70x = 393,718,415,441.65
  5. Step 5: Solve for x
    x = 393,718,415,441.65/719,071.70
  6. Step 6: Final answer
    x = 547,537.08

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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.