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Finding the Fourth Proportional to 626.64, 865.64 and 452.88

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Solution

The fourth proportional to 626.64, 865.64 and 452.88 is: 625.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.64 : 865.64 = 452.88 : x
  2. Step 2: Convert to fraction form
    626.64/865.64 = 452.88/x
  3. Step 3: Cross multiply
    626.64x = 865.64 × 452.88
  4. Step 4: Simplify right side
    626.64x = 392,031.04
  5. Step 5: Solve for x
    x = 392,031.04/626.64
  6. Step 6: Final answer
    x = 625.61

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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.