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Finding the Fourth Proportional to 628.11, 937.86 and 511.23

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Solution

The fourth proportional to 628.11, 937.86 and 511.23 is: 763.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.11 : 937.86 = 511.23 : x
  2. Step 2: Convert to fraction form
    628.11/937.86 = 511.23/x
  3. Step 3: Cross multiply
    628.11x = 937.86 × 511.23
  4. Step 4: Simplify right side
    628.11x = 479,462.17
  5. Step 5: Solve for x
    x = 479,462.17/628.11
  6. Step 6: Final answer
    x = 763.34

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.