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Finding the Fourth Proportional to 1,361.88, 2,043.50 and 631.33

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Solution

The fourth proportional to 1,361.88, 2,043.50 and 631.33 is: 947.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,361.88 : 2,043.50 = 631.33 : x
  2. Step 2: Convert to fraction form
    1,361.88/2,043.50 = 631.33/x
  3. Step 3: Cross multiply
    1,361.88x = 2,043.50 × 631.33
  4. Step 4: Simplify right side
    1,361.88x = 1,290,114.59
  5. Step 5: Solve for x
    x = 1,290,114.59/1,361.88
  6. Step 6: Final answer
    x = 947.30

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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.