Home / 1,291.17-1,779.39-1,186.41

Finding the Fourth Proportional to 1,291.17, 1,779.39 and 1,186.41

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Solution

The fourth proportional to 1,291.17, 1,779.39 and 1,186.41 is: 1,635.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,291.17 : 1,779.39 = 1,186.41 : x
  2. Step 2: Convert to fraction form
    1,291.17/1,779.39 = 1,186.41/x
  3. Step 3: Cross multiply
    1,291.17x = 1,779.39 × 1,186.41
  4. Step 4: Simplify right side
    1,291.17x = 2,111,086.09
  5. Step 5: Solve for x
    x = 2,111,086.09/1,291.17
  6. Step 6: Final answer
    x = 1,635.02

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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.