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Finding the Fourth Proportional to 1,142.09, 1,712.42 and 795.81

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Solution

The fourth proportional to 1,142.09, 1,712.42 and 795.81 is: 1,193.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,142.09 : 1,712.42 = 795.81 : x
  2. Step 2: Convert to fraction form
    1,142.09/1,712.42 = 795.81/x
  3. Step 3: Cross multiply
    1,142.09x = 1,712.42 × 795.81
  4. Step 4: Simplify right side
    1,142.09x = 1,362,760.96
  5. Step 5: Solve for x
    x = 1,362,760.96/1,142.09
  6. Step 6: Final answer
    x = 1,193.22

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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.