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Finding the Fourth Proportional to 1,813.11, 2,720.57 and 718.39

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Solution

The fourth proportional to 1,813.11, 2,720.57 and 718.39 is: 1,077.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,813.11 : 2,720.57 = 718.39 : x
  2. Step 2: Convert to fraction form
    1,813.11/2,720.57 = 718.39/x
  3. Step 3: Cross multiply
    1,813.11x = 2,720.57 × 718.39
  4. Step 4: Simplify right side
    1,813.11x = 1,954,430.28
  5. Step 5: Solve for x
    x = 1,954,430.28/1,813.11
  6. Step 6: Final answer
    x = 1,077.94

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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.