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Finding the Fourth Proportional to 262.35, 392.85 and 208.35

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Solution

The fourth proportional to 262.35, 392.85 and 208.35 is: 311.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    262.35 : 392.85 = 208.35 : x
  2. Step 2: Convert to fraction form
    262.35/392.85 = 208.35/x
  3. Step 3: Cross multiply
    262.35x = 392.85 × 208.35
  4. Step 4: Simplify right side
    262.35x = 81,850.30
  5. Step 5: Solve for x
    x = 81,850.30/262.35
  6. Step 6: Final answer
    x = 311.99

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.