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Finding the Fourth Proportional to 283,447.78, 391,157.90 and 156,123.37

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Solution

The fourth proportional to 283,447.78, 391,157.90 and 156,123.37 is: 215,450.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,447.78 : 391,157.90 = 156,123.37 : x
  2. Step 2: Convert to fraction form
    283,447.78/391,157.90 = 156,123.37/x
  3. Step 3: Cross multiply
    283,447.78x = 391,157.90 × 156,123.37
  4. Step 4: Simplify right side
    283,447.78x = 61,068,889,550.12
  5. Step 5: Solve for x
    x = 61,068,889,550.12/283,447.78
  6. Step 6: Final answer
    x = 215,450.23

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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.