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Finding the Fourth Proportional to 1,361.36, 2,041.80 and 630.80

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Solution

The fourth proportional to 1,361.36, 2,041.80 and 630.80 is: 946.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,361.36 : 2,041.80 = 630.80 : x
  2. Step 2: Convert to fraction form
    1,361.36/2,041.80 = 630.80/x
  3. Step 3: Cross multiply
    1,361.36x = 2,041.80 × 630.80
  4. Step 4: Simplify right side
    1,361.36x = 1,287,967.44
  5. Step 5: Solve for x
    x = 1,287,967.44/1,361.36
  6. Step 6: Final answer
    x = 946.09

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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.