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Finding the Fourth Proportional to 626.88, 864.64 and 461.28

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Solution

The fourth proportional to 626.88, 864.64 and 461.28 is: 636.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.88 : 864.64 = 461.28 : x
  2. Step 2: Convert to fraction form
    626.88/864.64 = 461.28/x
  3. Step 3: Cross multiply
    626.88x = 864.64 × 461.28
  4. Step 4: Simplify right side
    626.88x = 398,841.14
  5. Step 5: Solve for x
    x = 398,841.14/626.88
  6. Step 6: Final answer
    x = 636.23

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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.