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Finding the Fourth Proportional to 1,422.29, 1,962.95 and 832.82

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Solution

The fourth proportional to 1,422.29, 1,962.95 and 832.82 is: 1,149.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,422.29 : 1,962.95 = 832.82 : x
  2. Step 2: Convert to fraction form
    1,422.29/1,962.95 = 832.82/x
  3. Step 3: Cross multiply
    1,422.29x = 1,962.95 × 832.82
  4. Step 4: Simplify right side
    1,422.29x = 1,634,770.04
  5. Step 5: Solve for x
    x = 1,634,770.04/1,422.29
  6. Step 6: Final answer
    x = 1,149.39

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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.