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Finding the Fourth Proportional to 1,141.80, 1,576.56 and 743.65

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Solution

The fourth proportional to 1,141.80, 1,576.56 and 743.65 is: 1,026.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,141.80 : 1,576.56 = 743.65 : x
  2. Step 2: Convert to fraction form
    1,141.80/1,576.56 = 743.65/x
  3. Step 3: Cross multiply
    1,141.80x = 1,576.56 × 743.65
  4. Step 4: Simplify right side
    1,141.80x = 1,172,407.69
  5. Step 5: Solve for x
    x = 1,172,407.69/1,141.80
  6. Step 6: Final answer
    x = 1,026.81

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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.