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Finding the Fourth Proportional to 329,755.25, 455,062.28 and 186,512.21

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Solution

The fourth proportional to 329,755.25, 455,062.28 and 186,512.21 is: 257,386.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    329,755.25 : 455,062.28 = 186,512.21 : x
  2. Step 2: Convert to fraction form
    329,755.25/455,062.28 = 186,512.21/x
  3. Step 3: Cross multiply
    329,755.25x = 455,062.28 × 186,512.21
  4. Step 4: Simplify right side
    329,755.25x = 84,874,670,597.88
  5. Step 5: Solve for x
    x = 84,874,670,597.88/329,755.25
  6. Step 6: Final answer
    x = 257,386.87

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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.