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Finding the Fourth Proportional to 391,437.44, 540,183.30 and 219,356.76

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Solution

The fourth proportional to 391,437.44, 540,183.30 and 219,356.76 is: 302,712.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,437.44 : 540,183.30 = 219,356.76 : x
  2. Step 2: Convert to fraction form
    391,437.44/540,183.30 = 219,356.76/x
  3. Step 3: Cross multiply
    391,437.44x = 540,183.30 × 219,356.76
  4. Step 4: Simplify right side
    391,437.44x = 118,492,856,658.68
  5. Step 5: Solve for x
    x = 118,492,856,658.68/391,437.44
  6. Step 6: Final answer
    x = 302,712.11

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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.