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Finding the Fourth Proportional to 1,446.90, 1,996.97 and 857.76

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Solution

The fourth proportional to 1,446.90, 1,996.97 and 857.76 is: 1,183.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,446.90 : 1,996.97 = 857.76 : x
  2. Step 2: Convert to fraction form
    1,446.90/1,996.97 = 857.76/x
  3. Step 3: Cross multiply
    1,446.90x = 1,996.97 × 857.76
  4. Step 4: Simplify right side
    1,446.90x = 1,712,916.70
  5. Step 5: Solve for x
    x = 1,712,916.70/1,446.90
  6. Step 6: Final answer
    x = 1,183.85

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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.