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Finding the Fourth Proportional to 483.65, 667.64 and 287.18

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Solution

The fourth proportional to 483.65, 667.64 and 287.18 is: 396.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    483.65 : 667.64 = 287.18 : x
  2. Step 2: Convert to fraction form
    483.65/667.64 = 287.18/x
  3. Step 3: Cross multiply
    483.65x = 667.64 × 287.18
  4. Step 4: Simplify right side
    483.65x = 191,731.42
  5. Step 5: Solve for x
    x = 191,731.42/483.65
  6. Step 6: Final answer
    x = 396.43

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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.