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Finding the Fourth Proportional to 694.87, 1,042.21 and 304.72

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Solution

The fourth proportional to 694.87, 1,042.21 and 304.72 is: 457.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    694.87 : 1,042.21 = 304.72 : x
  2. Step 2: Convert to fraction form
    694.87/1,042.21 = 304.72/x
  3. Step 3: Cross multiply
    694.87x = 1,042.21 × 304.72
  4. Step 4: Simplify right side
    694.87x = 317,582.23
  5. Step 5: Solve for x
    x = 317,582.23/694.87
  6. Step 6: Final answer
    x = 457.04

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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.