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Finding the Fourth Proportional to 661,101.62, 912,515.19 and 431,694.56

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Solution

The fourth proportional to 661,101.62, 912,515.19 and 431,694.56 is: 595,865.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,101.62 : 912,515.19 = 431,694.56 : x
  2. Step 2: Convert to fraction form
    661,101.62/912,515.19 = 431,694.56/x
  3. Step 3: Cross multiply
    661,101.62x = 912,515.19 × 431,694.56
  4. Step 4: Simplify right side
    661,101.62x = 393,927,844,102.80
  5. Step 5: Solve for x
    x = 393,927,844,102.80/661,101.62
  6. Step 6: Final answer
    x = 595,865.80

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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.