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Finding the Fourth Proportional to 391,334.18, 586,994.87 and 154,678.91

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Solution

The fourth proportional to 391,334.18, 586,994.87 and 154,678.91 is: 232,015.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,334.18 : 586,994.87 = 154,678.91 : x
  2. Step 2: Convert to fraction form
    391,334.18/586,994.87 = 154,678.91/x
  3. Step 3: Cross multiply
    391,334.18x = 586,994.87 × 154,678.91
  4. Step 4: Simplify right side
    391,334.18x = 90,795,722,958.82
  5. Step 5: Solve for x
    x = 90,795,722,958.82/391,334.18
  6. Step 6: Final answer
    x = 232,015.83

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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.