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Finding the Fourth Proportional to 692.80, 955.67 and 456.79

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Solution

The fourth proportional to 692.80, 955.67 and 456.79 is: 630.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    692.80 : 955.67 = 456.79 : x
  2. Step 2: Convert to fraction form
    692.80/955.67 = 456.79/x
  3. Step 3: Cross multiply
    692.80x = 955.67 × 456.79
  4. Step 4: Simplify right side
    692.80x = 436,540.50
  5. Step 5: Solve for x
    x = 436,540.50/692.80
  6. Step 6: Final answer
    x = 630.11

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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.