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Finding the Fourth Proportional to 431,531.37, 647,515.76 and 290,994.75

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Solution

The fourth proportional to 431,531.37, 647,515.76 and 290,994.75 is: 436,639.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,531.37 : 647,515.76 = 290,994.75 : x
  2. Step 2: Convert to fraction form
    431,531.37/647,515.76 = 290,994.75/x
  3. Step 3: Cross multiply
    431,531.37x = 647,515.76 × 290,994.75
  4. Step 4: Simplify right side
    431,531.37x = 188,423,685,247.29
  5. Step 5: Solve for x
    x = 188,423,685,247.29/431,531.37
  6. Step 6: Final answer
    x = 436,639.60

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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.