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Finding the Fourth Proportional to 2,921.93, 4,381.74 and 1,361.63

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Solution

The fourth proportional to 2,921.93, 4,381.74 and 1,361.63 is: 2,041.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,921.93 : 4,381.74 = 1,361.63 : x
  2. Step 2: Convert to fraction form
    2,921.93/4,381.74 = 1,361.63/x
  3. Step 3: Cross multiply
    2,921.93x = 4,381.74 × 1,361.63
  4. Step 4: Simplify right side
    2,921.93x = 5,966,308.64
  5. Step 5: Solve for x
    x = 5,966,308.64/2,921.93
  6. Step 6: Final answer
    x = 2,041.91

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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.