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Finding the Fourth Proportional to 1,241.17, 1,712.70 and 743.81

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Solution

The fourth proportional to 1,241.17, 1,712.70 and 743.81 is: 1,026.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,241.17 : 1,712.70 = 743.81 : x
  2. Step 2: Convert to fraction form
    1,241.17/1,712.70 = 743.81/x
  3. Step 3: Cross multiply
    1,241.17x = 1,712.70 × 743.81
  4. Step 4: Simplify right side
    1,241.17x = 1,273,914.82
  5. Step 5: Solve for x
    x = 1,273,914.82/1,241.17
  6. Step 6: Final answer
    x = 1,026.38

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Double scale
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1.5x scale

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.