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Finding the Fourth Proportional to 463.75, 694.05 and 386.85

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Solution

The fourth proportional to 463.75, 694.05 and 386.85 is: 578.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    463.75 : 694.05 = 386.85 : x
  2. Step 2: Convert to fraction form
    463.75/694.05 = 386.85/x
  3. Step 3: Cross multiply
    463.75x = 694.05 × 386.85
  4. Step 4: Simplify right side
    463.75x = 268,493.24
  5. Step 5: Solve for x
    x = 268,493.24/463.75
  6. Step 6: Final answer
    x = 578.96

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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.