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Finding the Fourth Proportional to 1,262.70, 1,894.37 and 743.14

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Solution

The fourth proportional to 1,262.70, 1,894.37 and 743.14 is: 1,114.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,262.70 : 1,894.37 = 743.14 : x
  2. Step 2: Convert to fraction form
    1,262.70/1,894.37 = 743.14/x
  3. Step 3: Cross multiply
    1,262.70x = 1,894.37 × 743.14
  4. Step 4: Simplify right side
    1,262.70x = 1,407,768.93
  5. Step 5: Solve for x
    x = 1,407,768.93/1,262.70
  6. Step 6: Final answer
    x = 1,114.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.