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Finding the Fourth Proportional to 1,361.98, 2,043.37 and 631.97

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Solution

The fourth proportional to 1,361.98, 2,043.37 and 631.97 is: 948.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,361.98 : 2,043.37 = 631.97 : x
  2. Step 2: Convert to fraction form
    1,361.98/2,043.37 = 631.97/x
  3. Step 3: Cross multiply
    1,361.98x = 2,043.37 × 631.97
  4. Step 4: Simplify right side
    1,361.98x = 1,291,338.32
  5. Step 5: Solve for x
    x = 1,291,338.32/1,361.98
  6. Step 6: Final answer
    x = 948.14

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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.