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Finding the Fourth Proportional to 261,658.40, 392,487.60 and 191,674.40

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Solution

The fourth proportional to 261,658.40, 392,487.60 and 191,674.40 is: 287,511.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,658.40 : 392,487.60 = 191,674.40 : x
  2. Step 2: Convert to fraction form
    261,658.40/392,487.60 = 191,674.40/x
  3. Step 3: Cross multiply
    261,658.40x = 392,487.60 × 191,674.40
  4. Step 4: Simplify right side
    261,658.40x = 75,229,825,237.44
  5. Step 5: Solve for x
    x = 75,229,825,237.44/261,658.40
  6. Step 6: Final answer
    x = 287,511.60

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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.