Home / 1,918.27-2,646.28-1,131.86

Finding the Fourth Proportional to 1,918.27, 2,646.28 and 1,131.86

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Solution

The fourth proportional to 1,918.27, 2,646.28 and 1,131.86 is: 1,561.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,918.27 : 2,646.28 = 1,131.86 : x
  2. Step 2: Convert to fraction form
    1,918.27/2,646.28 = 1,131.86/x
  3. Step 3: Cross multiply
    1,918.27x = 2,646.28 × 1,131.86
  4. Step 4: Simplify right side
    1,918.27x = 2,995,218.48
  5. Step 5: Solve for x
    x = 2,995,218.48/1,918.27
  6. Step 6: Final answer
    x = 1,561.42

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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.