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Finding the Fourth Proportional to 283,712.58, 391,523.25 and 156,390.30

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Solution

The fourth proportional to 283,712.58, 391,523.25 and 156,390.30 is: 215,818.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    283,712.58 : 391,523.25 = 156,390.30 : x
  2. Step 2: Convert to fraction form
    283,712.58/391,523.25 = 156,390.30/x
  3. Step 3: Cross multiply
    283,712.58x = 391,523.25 × 156,390.30
  4. Step 4: Simplify right side
    283,712.58x = 61,230,438,524.48
  5. Step 5: Solve for x
    x = 61,230,438,524.48/283,712.58
  6. Step 6: Final answer
    x = 215,818.55

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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.