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Finding the Fourth Proportional to 691,524, 954,310.41 and 389,718

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Solution

The fourth proportional to 691,524, 954,310.41 and 389,718 is: 537,814.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,524 : 954,310.41 = 389,718 : x
  2. Step 2: Convert to fraction form
    691,524/954,310.41 = 389,718/x
  3. Step 3: Cross multiply
    691,524x = 954,310.41 × 389,718
  4. Step 4: Simplify right side
    691,524x = 371,911,944,364.38
  5. Step 5: Solve for x
    x = 371,911,944,364.38/691,524
  6. Step 6: Final answer
    x = 537,814.95

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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.