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Finding the Fourth Proportional to 245.79, 339.08 and 158.43

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Solution

The fourth proportional to 245.79, 339.08 and 158.43 is: 218.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.79 : 339.08 = 158.43 : x
  2. Step 2: Convert to fraction form
    245.79/339.08 = 158.43/x
  3. Step 3: Cross multiply
    245.79x = 339.08 × 158.43
  4. Step 4: Simplify right side
    245.79x = 53,719.65
  5. Step 5: Solve for x
    x = 53,719.65/245.79
  6. Step 6: Final answer
    x = 218.56

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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.