Home / 1,431.12-2,143-1,186.92

Finding the Fourth Proportional to 1,431.12, 2,143 and 1,186.92

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Solution

The fourth proportional to 1,431.12, 2,143 and 1,186.92 is: 1,777.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,431.12 : 2,143 = 1,186.92 : x
  2. Step 2: Convert to fraction form
    1,431.12/2,143 = 1,186.92/x
  3. Step 3: Cross multiply
    1,431.12x = 2,143 × 1,186.92
  4. Step 4: Simplify right side
    1,431.12x = 2,543,569.56
  5. Step 5: Solve for x
    x = 2,543,569.56/1,431.12
  6. Step 6: Final answer
    x = 1,777.33

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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.