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Finding the Fourth Proportional to 668.72, 923.08 and 503.42

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Solution

The fourth proportional to 668.72, 923.08 and 503.42 is: 694.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    668.72 : 923.08 = 503.42 : x
  2. Step 2: Convert to fraction form
    668.72/923.08 = 503.42/x
  3. Step 3: Cross multiply
    668.72x = 923.08 × 503.42
  4. Step 4: Simplify right side
    668.72x = 464,692.00
  5. Step 5: Solve for x
    x = 464,692.00/668.72
  6. Step 6: Final answer
    x = 694.90

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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.