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Finding the Fourth Proportional to 691,996.64, 954,933.71 and 405,707.40

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Solution

The fourth proportional to 691,996.64, 954,933.71 and 405,707.40 is: 559,863.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,996.64 : 954,933.71 = 405,707.40 : x
  2. Step 2: Convert to fraction form
    691,996.64/954,933.71 = 405,707.40/x
  3. Step 3: Cross multiply
    691,996.64x = 954,933.71 × 405,707.40
  4. Step 4: Simplify right side
    691,996.64x = 387,423,670,627.92
  5. Step 5: Solve for x
    x = 387,423,670,627.92/691,996.64
  6. Step 6: Final answer
    x = 559,863.52

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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.