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Finding the Fourth Proportional to 283,447.78, 391,158.99 and 156,123.07

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Solution

The fourth proportional to 283,447.78, 391,158.99 and 156,123.07 is: 215,450.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,447.78 : 391,158.99 = 156,123.07 : x
  2. Step 2: Convert to fraction form
    283,447.78/391,158.99 = 156,123.07/x
  3. Step 3: Cross multiply
    283,447.78x = 391,158.99 × 156,123.07
  4. Step 4: Simplify right side
    283,447.78x = 61,068,941,399.00
  5. Step 5: Solve for x
    x = 61,068,941,399.00/283,447.78
  6. Step 6: Final answer
    x = 215,450.42

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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.