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Finding the Fourth Proportional to 718,200.37, 991,105.67 and 395,903.50

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Solution

The fourth proportional to 718,200.37, 991,105.67 and 395,903.50 is: 546,340.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,200.37 : 991,105.67 = 395,903.50 : x
  2. Step 2: Convert to fraction form
    718,200.37/991,105.67 = 395,903.50/x
  3. Step 3: Cross multiply
    718,200.37x = 991,105.67 × 395,903.50
  4. Step 4: Simplify right side
    718,200.37x = 392,382,202,134.84
  5. Step 5: Solve for x
    x = 392,382,202,134.84/718,200.37
  6. Step 6: Final answer
    x = 546,340.85

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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.