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Finding the Fourth Proportional to 691,969.64, 954,896.45 and 405,680.40

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Solution

The fourth proportional to 691,969.64, 954,896.45 and 405,680.40 is: 559,826.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,969.64 : 954,896.45 = 405,680.40 : x
  2. Step 2: Convert to fraction form
    691,969.64/954,896.45 = 405,680.40/x
  3. Step 3: Cross multiply
    691,969.64x = 954,896.45 × 405,680.40
  4. Step 4: Simplify right side
    691,969.64x = 387,382,771,766.18
  5. Step 5: Solve for x
    x = 387,382,771,766.18/691,969.64
  6. Step 6: Final answer
    x = 559,826.26

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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.