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Finding the Fourth Proportional to 463.53, 640.17 and 316.56

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Solution

The fourth proportional to 463.53, 640.17 and 316.56 is: 437.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    463.53 : 640.17 = 316.56 : x
  2. Step 2: Convert to fraction form
    463.53/640.17 = 316.56/x
  3. Step 3: Cross multiply
    463.53x = 640.17 × 316.56
  4. Step 4: Simplify right side
    463.53x = 202,652.22
  5. Step 5: Solve for x
    x = 202,652.22/463.53
  6. Step 6: Final answer
    x = 437.19

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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.