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Finding the Fourth Proportional to 463.87, 640.25 and 316.57

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Solution

The fourth proportional to 463.87, 640.25 and 316.57 is: 436.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    463.87 : 640.25 = 316.57 : x
  2. Step 2: Convert to fraction form
    463.87/640.25 = 316.57/x
  3. Step 3: Cross multiply
    463.87x = 640.25 × 316.57
  4. Step 4: Simplify right side
    463.87x = 202,683.94
  5. Step 5: Solve for x
    x = 202,683.94/463.87
  6. Step 6: Final answer
    x = 436.94

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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.