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Finding the Fourth Proportional to 358.94, 494.43 and 281.18

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Solution

The fourth proportional to 358.94, 494.43 and 281.18 is: 387.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    358.94 : 494.43 = 281.18 : x
  2. Step 2: Convert to fraction form
    358.94/494.43 = 281.18/x
  3. Step 3: Cross multiply
    358.94x = 494.43 × 281.18
  4. Step 4: Simplify right side
    358.94x = 139,023.83
  5. Step 5: Solve for x
    x = 139,023.83/358.94
  6. Step 6: Final answer
    x = 387.32

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.