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Finding the Fourth Proportional to 256,480.40, 353,961.26 and 141,756.56

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Solution

The fourth proportional to 256,480.40, 353,961.26 and 141,756.56 is: 195,634.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,480.40 : 353,961.26 = 141,756.56 : x
  2. Step 2: Convert to fraction form
    256,480.40/353,961.26 = 141,756.56/x
  3. Step 3: Cross multiply
    256,480.40x = 353,961.26 × 141,756.56
  4. Step 4: Simplify right side
    256,480.40x = 50,176,330,590.87
  5. Step 5: Solve for x
    x = 50,176,330,590.87/256,480.40
  6. Step 6: Final answer
    x = 195,634.17

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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.