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Finding the Fourth Proportional to 245.47, 338.62 and 158.05

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Solution

The fourth proportional to 245.47, 338.62 and 158.05 is: 218.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.47 : 338.62 = 158.05 : x
  2. Step 2: Convert to fraction form
    245.47/338.62 = 158.05/x
  3. Step 3: Cross multiply
    245.47x = 338.62 × 158.05
  4. Step 4: Simplify right side
    245.47x = 53,518.89
  5. Step 5: Solve for x
    x = 53,518.89/245.47
  6. Step 6: Final answer
    x = 218.03

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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.