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Finding the Fourth Proportional to 283,643.75, 391,436.48 and 156,327.55

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Solution

The fourth proportional to 283,643.75, 391,436.48 and 156,327.55 is: 215,736.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,643.75 : 391,436.48 = 156,327.55 : x
  2. Step 2: Convert to fraction form
    283,643.75/391,436.48 = 156,327.55/x
  3. Step 3: Cross multiply
    283,643.75x = 391,436.48 × 156,327.55
  4. Step 4: Simplify right side
    283,643.75x = 61,192,305,899.02
  5. Step 5: Solve for x
    x = 61,192,305,899.02/283,643.75
  6. Step 6: Final answer
    x = 215,736.49

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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.