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Finding the Fourth Proportional to 256,812.12, 354,381.48 and 143,613

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Solution

The fourth proportional to 256,812.12, 354,381.48 and 143,613 is: 198,175.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,812.12 : 354,381.48 = 143,613 : x
  2. Step 2: Convert to fraction form
    256,812.12/354,381.48 = 143,613/x
  3. Step 3: Cross multiply
    256,812.12x = 354,381.48 × 143,613
  4. Step 4: Simplify right side
    256,812.12x = 50,893,787,487.24
  5. Step 5: Solve for x
    x = 50,893,787,487.24/256,812.12
  6. Step 6: Final answer
    x = 198,175.18

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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.