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Finding the Fourth Proportional to 391,653.05, 540,658.31 and 246,671.90

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Solution

The fourth proportional to 391,653.05, 540,658.31 and 246,671.90 is: 340,518.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,653.05 : 540,658.31 = 246,671.90 : x
  2. Step 2: Convert to fraction form
    391,653.05/540,658.31 = 246,671.90/x
  3. Step 3: Cross multiply
    391,653.05x = 540,658.31 × 246,671.90
  4. Step 4: Simplify right side
    391,653.05x = 133,365,212,578.49
  5. Step 5: Solve for x
    x = 133,365,212,578.49/391,653.05
  6. Step 6: Final answer
    x = 340,518.76

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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.