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Finding the Fourth Proportional to 694.60, 1,042.27 and 369.95

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Solution

The fourth proportional to 694.60, 1,042.27 and 369.95 is: 555.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    694.60 : 1,042.27 = 369.95 : x
  2. Step 2: Convert to fraction form
    694.60/1,042.27 = 369.95/x
  3. Step 3: Cross multiply
    694.60x = 1,042.27 × 369.95
  4. Step 4: Simplify right side
    694.60x = 385,581.65
  5. Step 5: Solve for x
    x = 385,581.65/694.60
  6. Step 6: Final answer
    x = 555.12

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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.