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Finding the Fourth Proportional to 245.34, 338.55 and 140.40

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Solution

The fourth proportional to 245.34, 338.55 and 140.40 is: 193.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.34 : 338.55 = 140.40 : x
  2. Step 2: Convert to fraction form
    245.34/338.55 = 140.40/x
  3. Step 3: Cross multiply
    245.34x = 338.55 × 140.40
  4. Step 4: Simplify right side
    245.34x = 47,532.42
  5. Step 5: Solve for x
    x = 47,532.42/245.34
  6. Step 6: Final answer
    x = 193.74

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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.