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Finding the Fourth Proportional to 1,295, 1,787.10 and 743

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Solution

The fourth proportional to 1,295, 1,787.10 and 743 is: 1,025.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,295 : 1,787.10 = 743 : x
  2. Step 2: Convert to fraction form
    1,295/1,787.10 = 743/x
  3. Step 3: Cross multiply
    1,295x = 1,787.10 × 743
  4. Step 4: Simplify right side
    1,295x = 1,327,815.30
  5. Step 5: Solve for x
    x = 1,327,815.30/1,295
  6. Step 6: Final answer
    x = 1,025.34

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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.