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Finding the Fourth Proportional to 1,551.29, 2,142.96 and 1,411.16

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Solution

The fourth proportional to 1,551.29, 2,142.96 and 1,411.16 is: 1,949.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,551.29 : 2,142.96 = 1,411.16 : x
  2. Step 2: Convert to fraction form
    1,551.29/2,142.96 = 1,411.16/x
  3. Step 3: Cross multiply
    1,551.29x = 2,142.96 × 1,411.16
  4. Step 4: Simplify right side
    1,551.29x = 3,024,063.42
  5. Step 5: Solve for x
    x = 3,024,063.42/1,551.29
  6. Step 6: Final answer
    x = 1,949.39

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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.