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Finding the Fourth Proportional to 629.61, 943.45 and 264.20

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Solution

The fourth proportional to 629.61, 943.45 and 264.20 is: 395.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    629.61 : 943.45 = 264.20 : x
  2. Step 2: Convert to fraction form
    629.61/943.45 = 264.20/x
  3. Step 3: Cross multiply
    629.61x = 943.45 × 264.20
  4. Step 4: Simplify right side
    629.61x = 249,259.49
  5. Step 5: Solve for x
    x = 249,259.49/629.61
  6. Step 6: Final answer
    x = 395.90

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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.