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Finding the Fourth Proportional to 357.85, 494.61 and 284.04

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Solution

The fourth proportional to 357.85, 494.61 and 284.04 is: 392.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    357.85 : 494.61 = 284.04 : x
  2. Step 2: Convert to fraction form
    357.85/494.61 = 284.04/x
  3. Step 3: Cross multiply
    357.85x = 494.61 × 284.04
  4. Step 4: Simplify right side
    357.85x = 140,487.96
  5. Step 5: Solve for x
    x = 140,487.96/357.85
  6. Step 6: Final answer
    x = 392.59

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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.