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Finding the Fourth Proportional to 391,512.60, 587,307.66 and 125,206.20

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Solution

The fourth proportional to 391,512.60, 587,307.66 and 125,206.20 is: 187,821.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,512.60 : 587,307.66 = 125,206.20 : x
  2. Step 2: Convert to fraction form
    391,512.60/587,307.66 = 125,206.20/x
  3. Step 3: Cross multiply
    391,512.60x = 587,307.66 × 125,206.20
  4. Step 4: Simplify right side
    391,512.60x = 73,534,560,339.49
  5. Step 5: Solve for x
    x = 73,534,560,339.49/391,512.60
  6. Step 6: Final answer
    x = 187,821.70

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.