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Finding the Fourth Proportional to 463.30, 694.61 and 280.65

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Solution

The fourth proportional to 463.30, 694.61 and 280.65 is: 420.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    463.30 : 694.61 = 280.65 : x
  2. Step 2: Convert to fraction form
    463.30/694.61 = 280.65/x
  3. Step 3: Cross multiply
    463.30x = 694.61 × 280.65
  4. Step 4: Simplify right side
    463.30x = 194,942.30
  5. Step 5: Solve for x
    x = 194,942.30/463.30
  6. Step 6: Final answer
    x = 420.77

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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.