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Finding the Fourth Proportional to 256,583.60, 354,079.26 and 143,416.88

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Solution

The fourth proportional to 256,583.60, 354,079.26 and 143,416.88 is: 197,911.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,583.60 : 354,079.26 = 143,416.88 : x
  2. Step 2: Convert to fraction form
    256,583.60/354,079.26 = 143,416.88/x
  3. Step 3: Cross multiply
    256,583.60x = 354,079.26 × 143,416.88
  4. Step 4: Simplify right side
    256,583.60x = 50,780,943,089.29
  5. Step 5: Solve for x
    x = 50,780,943,089.29/256,583.60
  6. Step 6: Final answer
    x = 197,911.88

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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.