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Finding the Fourth Proportional to 694.42, 1,042.55 and 637.11

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Solution

The fourth proportional to 694.42, 1,042.55 and 637.11 is: 956.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    694.42 : 1,042.55 = 637.11 : x
  2. Step 2: Convert to fraction form
    694.42/1,042.55 = 637.11/x
  3. Step 3: Cross multiply
    694.42x = 1,042.55 × 637.11
  4. Step 4: Simplify right side
    694.42x = 664,219.03
  5. Step 5: Solve for x
    x = 664,219.03/694.42
  6. Step 6: Final answer
    x = 956.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.