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Finding the Fourth Proportional to 1,361.70, 2,042.60 and 540

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Solution

The fourth proportional to 1,361.70, 2,042.60 and 540 is: 810.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,361.70 : 2,042.60 = 540 : x
  2. Step 2: Convert to fraction form
    1,361.70/2,042.60 = 540/x
  3. Step 3: Cross multiply
    1,361.70x = 2,042.60 × 540
  4. Step 4: Simplify right side
    1,361.70x = 1,103,001.30
  5. Step 5: Solve for x
    x = 1,103,001.30/1,361.70
  6. Step 6: Final answer
    x = 810.02

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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.