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Finding the Fourth Proportional to 640.95, 884.53 and 361.18

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Solution

The fourth proportional to 640.95, 884.53 and 361.18 is: 498.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    640.95 : 884.53 = 361.18 : x
  2. Step 2: Convert to fraction form
    640.95/884.53 = 361.18/x
  3. Step 3: Cross multiply
    640.95x = 884.53 × 361.18
  4. Step 4: Simplify right side
    640.95x = 319,471.76
  5. Step 5: Solve for x
    x = 319,471.76/640.95
  6. Step 6: Final answer
    x = 498.44

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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.