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Finding the Fourth Proportional to 245.17, 338.39 and 145.59

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Solution

The fourth proportional to 245.17, 338.39 and 145.59 is: 200.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.17 : 338.39 = 145.59 : x
  2. Step 2: Convert to fraction form
    245.17/338.39 = 145.59/x
  3. Step 3: Cross multiply
    245.17x = 338.39 × 145.59
  4. Step 4: Simplify right side
    245.17x = 49,263.78
  5. Step 5: Solve for x
    x = 49,263.78/245.17
  6. Step 6: Final answer
    x = 200.94

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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.