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Finding the Fourth Proportional to 1,361.14, 1,877.65 and 862.93

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Solution

The fourth proportional to 1,361.14, 1,877.65 and 862.93 is: 1,190.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,361.14 : 1,877.65 = 862.93 : x
  2. Step 2: Convert to fraction form
    1,361.14/1,877.65 = 862.93/x
  3. Step 3: Cross multiply
    1,361.14x = 1,877.65 × 862.93
  4. Step 4: Simplify right side
    1,361.14x = 1,620,280.51
  5. Step 5: Solve for x
    x = 1,620,280.51/1,361.14
  6. Step 6: Final answer
    x = 1,190.38

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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.