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Finding the Fourth Proportional to 256,011.87, 353,212.09 and 165,421.17

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Solution

The fourth proportional to 256,011.87, 353,212.09 and 165,421.17 is: 228,226.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,011.87 : 353,212.09 = 165,421.17 : x
  2. Step 2: Convert to fraction form
    256,011.87/353,212.09 = 165,421.17/x
  3. Step 3: Cross multiply
    256,011.87x = 353,212.09 × 165,421.17
  4. Step 4: Simplify right side
    256,011.87x = 58,428,757,702.89
  5. Step 5: Solve for x
    x = 58,428,757,702.89/256,011.87
  6. Step 6: Final answer
    x = 228,226.75

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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.