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Finding the Fourth Proportional to 391,876.82, 540,795.61 and 293,585.90

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Solution

The fourth proportional to 391,876.82, 540,795.61 and 293,585.90 is: 405,152.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,876.82 : 540,795.61 = 293,585.90 : x
  2. Step 2: Convert to fraction form
    391,876.82/540,795.61 = 293,585.90/x
  3. Step 3: Cross multiply
    391,876.82x = 540,795.61 × 293,585.90
  4. Step 4: Simplify right side
    391,876.82x = 158,769,967,408.59
  5. Step 5: Solve for x
    x = 158,769,967,408.59/391,876.82
  6. Step 6: Final answer
    x = 405,152.74

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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.