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Finding the Fourth Proportional to 256,743.47, 354,186.69 and 166,128.66

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Solution

The fourth proportional to 256,743.47, 354,186.69 and 166,128.66 is: 229,180.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,743.47 : 354,186.69 = 166,128.66 : x
  2. Step 2: Convert to fraction form
    256,743.47/354,186.69 = 166,128.66/x
  3. Step 3: Cross multiply
    256,743.47x = 354,186.69 × 166,128.66
  4. Step 4: Simplify right side
    256,743.47x = 58,840,559,576.55
  5. Step 5: Solve for x
    x = 58,840,559,576.55/256,743.47
  6. Step 6: Final answer
    x = 229,180.35

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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.