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Finding the Fourth Proportional to 283,391.64, 391,072.85 and 154,327.55

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Solution

The fourth proportional to 283,391.64, 391,072.85 and 154,327.55 is: 212,967.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,391.64 : 391,072.85 = 154,327.55 : x
  2. Step 2: Convert to fraction form
    283,391.64/391,072.85 = 154,327.55/x
  3. Step 3: Cross multiply
    283,391.64x = 391,072.85 × 154,327.55
  4. Step 4: Simplify right side
    283,391.64x = 60,353,312,085.02
  5. Step 5: Solve for x
    x = 60,353,312,085.02/283,391.64
  6. Step 6: Final answer
    x = 212,967.86

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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.