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Finding the Fourth Proportional to 1,813.55, 2,721.38 and 718.02

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Solution

The fourth proportional to 1,813.55, 2,721.38 and 718.02 is: 1,077.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,813.55 : 2,721.38 = 718.02 : x
  2. Step 2: Convert to fraction form
    1,813.55/2,721.38 = 718.02/x
  3. Step 3: Cross multiply
    1,813.55x = 2,721.38 × 718.02
  4. Step 4: Simplify right side
    1,813.55x = 1,954,001.68
  5. Step 5: Solve for x
    x = 1,954,001.68/1,813.55
  6. Step 6: Final answer
    x = 1,077.45

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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.