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Finding the Fourth Proportional to 651.23, 903.34 and 628.55

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Solution

The fourth proportional to 651.23, 903.34 and 628.55 is: 871.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.23 : 903.34 = 628.55 : x
  2. Step 2: Convert to fraction form
    651.23/903.34 = 628.55/x
  3. Step 3: Cross multiply
    651.23x = 903.34 × 628.55
  4. Step 4: Simplify right side
    651.23x = 567,791.21
  5. Step 5: Solve for x
    x = 567,791.21/651.23
  6. Step 6: Final answer
    x = 871.88

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.