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Finding the Fourth Proportional to 461.51, 637.16 and 287.09

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Solution

The fourth proportional to 461.51, 637.16 and 287.09 is: 396.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    461.51 : 637.16 = 287.09 : x
  2. Step 2: Convert to fraction form
    461.51/637.16 = 287.09/x
  3. Step 3: Cross multiply
    461.51x = 637.16 × 287.09
  4. Step 4: Simplify right side
    461.51x = 182,917.64
  5. Step 5: Solve for x
    x = 182,917.64/461.51
  6. Step 6: Final answer
    x = 396.35

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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.