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Finding the Fourth Proportional to 288,040.80, 431,672.40 and 193,000.80

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Solution

The fourth proportional to 288,040.80, 431,672.40 and 193,000.80 is: 289,240.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,040.80 : 431,672.40 = 193,000.80 : x
  2. Step 2: Convert to fraction form
    288,040.80/431,672.40 = 193,000.80/x
  3. Step 3: Cross multiply
    288,040.80x = 431,672.40 × 193,000.80
  4. Step 4: Simplify right side
    288,040.80x = 83,313,118,537.92
  5. Step 5: Solve for x
    x = 83,313,118,537.92/288,040.80
  6. Step 6: Final answer
    x = 289,240.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.