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Finding the Fourth Proportional to 629.63, 869.29 and 463.55

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Solution

The fourth proportional to 629.63, 869.29 and 463.55 is: 639.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.63 : 869.29 = 463.55 : x
  2. Step 2: Convert to fraction form
    629.63/869.29 = 463.55/x
  3. Step 3: Cross multiply
    629.63x = 869.29 × 463.55
  4. Step 4: Simplify right side
    629.63x = 402,959.38
  5. Step 5: Solve for x
    x = 402,959.38/629.63
  6. Step 6: Final answer
    x = 639.99

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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.