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Finding the Fourth Proportional to 261,311.69, 391,702.85 and 177,080.36

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Solution

The fourth proportional to 261,311.69, 391,702.85 and 177,080.36 is: 265,441.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,311.69 : 391,702.85 = 177,080.36 : x
  2. Step 2: Convert to fraction form
    261,311.69/391,702.85 = 177,080.36/x
  3. Step 3: Cross multiply
    261,311.69x = 391,702.85 × 177,080.36
  4. Step 4: Simplify right side
    261,311.69x = 69,362,883,335.86
  5. Step 5: Solve for x
    x = 69,362,883,335.86/261,311.69
  6. Step 6: Final answer
    x = 265,441.18

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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.