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Finding the Fourth Proportional to 692.54, 955.18 and 505.97

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Solution

The fourth proportional to 692.54, 955.18 and 505.97 is: 697.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    692.54 : 955.18 = 505.97 : x
  2. Step 2: Convert to fraction form
    692.54/955.18 = 505.97/x
  3. Step 3: Cross multiply
    692.54x = 955.18 × 505.97
  4. Step 4: Simplify right side
    692.54x = 483,292.42
  5. Step 5: Solve for x
    x = 483,292.42/692.54
  6. Step 6: Final answer
    x = 697.85

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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.