Home / 1,814.09-2,721.20-515.66

Finding the Fourth Proportional to 1,814.09, 2,721.20 and 515.66

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Solution

The fourth proportional to 1,814.09, 2,721.20 and 515.66 is: 773.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,814.09 : 2,721.20 = 515.66 : x
  2. Step 2: Convert to fraction form
    1,814.09/2,721.20 = 515.66/x
  3. Step 3: Cross multiply
    1,814.09x = 2,721.20 × 515.66
  4. Step 4: Simplify right side
    1,814.09x = 1,403,197.81
  5. Step 5: Solve for x
    x = 1,403,197.81/1,814.09
  6. Step 6: Final answer
    x = 773.50

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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.