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Finding the Fourth Proportional to 391,776.30, 587,631.78 and 277,451.46

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Solution

The fourth proportional to 391,776.30, 587,631.78 and 277,451.46 is: 416,154.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,776.30 : 587,631.78 = 277,451.46 : x
  2. Step 2: Convert to fraction form
    391,776.30/587,631.78 = 277,451.46/x
  3. Step 3: Cross multiply
    391,776.30x = 587,631.78 × 277,451.46
  4. Step 4: Simplify right side
    391,776.30x = 163,039,295,303.40
  5. Step 5: Solve for x
    x = 163,039,295,303.40/391,776.30
  6. Step 6: Final answer
    x = 416,154.05

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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.