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Finding the Fourth Proportional to 256,831.62, 354,408.36 and 143,632.50

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Solution

The fourth proportional to 256,831.62, 354,408.36 and 143,632.50 is: 198,202.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,831.62 : 354,408.36 = 143,632.50 : x
  2. Step 2: Convert to fraction form
    256,831.62/354,408.36 = 143,632.50/x
  3. Step 3: Cross multiply
    256,831.62x = 354,408.36 × 143,632.50
  4. Step 4: Simplify right side
    256,831.62x = 50,904,558,767.70
  5. Step 5: Solve for x
    x = 50,904,558,767.70/256,831.62
  6. Step 6: Final answer
    x = 198,202.07

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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.