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Finding the Fourth Proportional to 692.22, 955.30 and 381.72

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Solution

The fourth proportional to 692.22, 955.30 and 381.72 is: 526.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    692.22 : 955.30 = 381.72 : x
  2. Step 2: Convert to fraction form
    692.22/955.30 = 381.72/x
  3. Step 3: Cross multiply
    692.22x = 955.30 × 381.72
  4. Step 4: Simplify right side
    692.22x = 364,657.12
  5. Step 5: Solve for x
    x = 364,657.12/692.22
  6. Step 6: Final answer
    x = 526.79

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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.