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Finding the Fourth Proportional to 461.82, 637.20 and 287.04

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Solution

The fourth proportional to 461.82, 637.20 and 287.04 is: 396.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    461.82 : 637.20 = 287.04 : x
  2. Step 2: Convert to fraction form
    461.82/637.20 = 287.04/x
  3. Step 3: Cross multiply
    461.82x = 637.20 × 287.04
  4. Step 4: Simplify right side
    461.82x = 182,901.89
  5. Step 5: Solve for x
    x = 182,901.89/461.82
  6. Step 6: Final answer
    x = 396.05

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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.