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Finding the Fourth Proportional to 692.43, 955.55 and 381.93

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Solution

The fourth proportional to 692.43, 955.55 and 381.93 is: 527.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    692.43 : 955.55 = 381.93 : x
  2. Step 2: Convert to fraction form
    692.43/955.55 = 381.93/x
  3. Step 3: Cross multiply
    692.43x = 955.55 × 381.93
  4. Step 4: Simplify right side
    692.43x = 364,954.17
  5. Step 5: Solve for x
    x = 364,954.17/692.43
  6. Step 6: Final answer
    x = 527.06

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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.