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Finding the Fourth Proportional to 691,767, 954,653.04 and 389,961

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Solution

The fourth proportional to 691,767, 954,653.04 and 389,961 is: 538,154.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,767 : 954,653.04 = 389,961 : x
  2. Step 2: Convert to fraction form
    691,767/954,653.04 = 389,961/x
  3. Step 3: Cross multiply
    691,767x = 954,653.04 × 389,961
  4. Step 4: Simplify right side
    691,767x = 372,277,454,131.44
  5. Step 5: Solve for x
    x = 372,277,454,131.44/691,767
  6. Step 6: Final answer
    x = 538,154.40

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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.