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Finding the Fourth Proportional to 2,696.90, 3,720.33 and 1,813.59

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Solution

The fourth proportional to 2,696.90, 3,720.33 and 1,813.59 is: 2,501.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,696.90 : 3,720.33 = 1,813.59 : x
  2. Step 2: Convert to fraction form
    2,696.90/3,720.33 = 1,813.59/x
  3. Step 3: Cross multiply
    2,696.90x = 3,720.33 × 1,813.59
  4. Step 4: Simplify right side
    2,696.90x = 6,747,153.28
  5. Step 5: Solve for x
    x = 6,747,153.28/2,696.90
  6. Step 6: Final answer
    x = 2,501.82

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1.5x scale

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.