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Finding the Fourth Proportional to 283,690.62, 391,488.39 and 156,378.06

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Solution

The fourth proportional to 283,690.62, 391,488.39 and 156,378.06 is: 215,799.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,690.62 : 391,488.39 = 156,378.06 : x
  2. Step 2: Convert to fraction form
    283,690.62/391,488.39 = 156,378.06/x
  3. Step 3: Cross multiply
    283,690.62x = 391,488.39 × 156,378.06
  4. Step 4: Simplify right side
    283,690.62x = 61,220,194,940.72
  5. Step 5: Solve for x
    x = 61,220,194,940.72/283,690.62
  6. Step 6: Final answer
    x = 215,799.15

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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.