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Finding the Fourth Proportional to 256,521.82, 353,999.54 and 143,344.58

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Solution

The fourth proportional to 256,521.82, 353,999.54 and 143,344.58 is: 197,815.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,521.82 : 353,999.54 = 143,344.58 : x
  2. Step 2: Convert to fraction form
    256,521.82/353,999.54 = 143,344.58/x
  3. Step 3: Cross multiply
    256,521.82x = 353,999.54 × 143,344.58
  4. Step 4: Simplify right side
    256,521.82x = 50,743,915,381.49
  5. Step 5: Solve for x
    x = 50,743,915,381.49/256,521.82
  6. Step 6: Final answer
    x = 197,815.20

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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.