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Finding the Fourth Proportional to 1,361.65, 1,878.81 and 941.35

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Solution

The fourth proportional to 1,361.65, 1,878.81 and 941.35 is: 1,298.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,361.65 : 1,878.81 = 941.35 : x
  2. Step 2: Convert to fraction form
    1,361.65/1,878.81 = 941.35/x
  3. Step 3: Cross multiply
    1,361.65x = 1,878.81 × 941.35
  4. Step 4: Simplify right side
    1,361.65x = 1,768,608.40
  5. Step 5: Solve for x
    x = 1,768,608.40/1,361.65
  6. Step 6: Final answer
    x = 1,298.88

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.