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Finding the Fourth Proportional to 283,830.80, 391,687.32 and 156,503.60

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Solution

The fourth proportional to 283,830.80, 391,687.32 and 156,503.60 is: 215,975.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,830.80 : 391,687.32 = 156,503.60 : x
  2. Step 2: Convert to fraction form
    283,830.80/391,687.32 = 156,503.60/x
  3. Step 3: Cross multiply
    283,830.80x = 391,687.32 × 156,503.60
  4. Step 4: Simplify right side
    283,830.80x = 61,300,475,654.35
  5. Step 5: Solve for x
    x = 61,300,475,654.35/283,830.80
  6. Step 6: Final answer
    x = 215,975.42

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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.