Home / 1,291.08-1,941.28-1,189.59

Finding the Fourth Proportional to 1,291.08, 1,941.28 and 1,189.59

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Solution

The fourth proportional to 1,291.08, 1,941.28 and 1,189.59 is: 1,788.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,291.08 : 1,941.28 = 1,189.59 : x
  2. Step 2: Convert to fraction form
    1,291.08/1,941.28 = 1,189.59/x
  3. Step 3: Cross multiply
    1,291.08x = 1,941.28 × 1,189.59
  4. Step 4: Simplify right side
    1,291.08x = 2,309,323.71
  5. Step 5: Solve for x
    x = 2,309,323.71/1,291.08
  6. Step 6: Final answer
    x = 1,788.68

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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.