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Finding the Fourth Proportional to 1,914.85, 2,642.85 and 1,169.47

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Solution

The fourth proportional to 1,914.85, 2,642.85 and 1,169.47 is: 1,614.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,914.85 : 2,642.85 = 1,169.47 : x
  2. Step 2: Convert to fraction form
    1,914.85/2,642.85 = 1,169.47/x
  3. Step 3: Cross multiply
    1,914.85x = 2,642.85 × 1,169.47
  4. Step 4: Simplify right side
    1,914.85x = 3,090,733.79
  5. Step 5: Solve for x
    x = 3,090,733.79/1,914.85
  6. Step 6: Final answer
    x = 1,614.09

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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.