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Finding the Fourth Proportional to 691,757, 954,639.24 and 389,951

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Solution

The fourth proportional to 691,757, 954,639.24 and 389,951 is: 538,140.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,757 : 954,639.24 = 389,951 : x
  2. Step 2: Convert to fraction form
    691,757/954,639.24 = 389,951/x
  3. Step 3: Cross multiply
    691,757x = 954,639.24 × 389,951
  4. Step 4: Simplify right side
    691,757x = 372,262,526,277.24
  5. Step 5: Solve for x
    x = 372,262,526,277.24/691,757
  6. Step 6: Final answer
    x = 538,140.60

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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.