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Finding the Fourth Proportional to 321,145.32, 443,205.54 and 177,918.60

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Solution

The fourth proportional to 321,145.32, 443,205.54 and 177,918.60 is: 245,541.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,145.32 : 443,205.54 = 177,918.60 : x
  2. Step 2: Convert to fraction form
    321,145.32/443,205.54 = 177,918.60/x
  3. Step 3: Cross multiply
    321,145.32x = 443,205.54 × 177,918.60
  4. Step 4: Simplify right side
    321,145.32x = 78,854,509,189.04
  5. Step 5: Solve for x
    x = 78,854,509,189.04/321,145.32
  6. Step 6: Final answer
    x = 245,541.52

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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.