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Finding the Fourth Proportional to 628.53, 937.67 and 612.42

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Solution

The fourth proportional to 628.53, 937.67 and 612.42 is: 913.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.53 : 937.67 = 612.42 : x
  2. Step 2: Convert to fraction form
    628.53/937.67 = 612.42/x
  3. Step 3: Cross multiply
    628.53x = 937.67 × 612.42
  4. Step 4: Simplify right side
    628.53x = 574,240.11
  5. Step 5: Solve for x
    x = 574,240.11/628.53
  6. Step 6: Final answer
    x = 913.63

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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.