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Finding the Fourth Proportional to 1,261.97, 1,893.59 and 955.70

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Solution

The fourth proportional to 1,261.97, 1,893.59 and 955.70 is: 1,434.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,261.97 : 1,893.59 = 955.70 : x
  2. Step 2: Convert to fraction form
    1,261.97/1,893.59 = 955.70/x
  3. Step 3: Cross multiply
    1,261.97x = 1,893.59 × 955.70
  4. Step 4: Simplify right side
    1,261.97x = 1,809,703.96
  5. Step 5: Solve for x
    x = 1,809,703.96/1,261.97
  6. Step 6: Final answer
    x = 1,434.03

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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.