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Finding the Fourth Proportional to 285.58, 394.10 and 154.59

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Solution

The fourth proportional to 285.58, 394.10 and 154.59 is: 213.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.58 : 394.10 = 154.59 : x
  2. Step 2: Convert to fraction form
    285.58/394.10 = 154.59/x
  3. Step 3: Cross multiply
    285.58x = 394.10 × 154.59
  4. Step 4: Simplify right side
    285.58x = 60,923.92
  5. Step 5: Solve for x
    x = 60,923.92/285.58
  6. Step 6: Final answer
    x = 213.34

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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.