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Finding the Fourth Proportional to 245.49, 340.61 and 243.39

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Solution

The fourth proportional to 245.49, 340.61 and 243.39 is: 337.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.49 : 340.61 = 243.39 : x
  2. Step 2: Convert to fraction form
    245.49/340.61 = 243.39/x
  3. Step 3: Cross multiply
    245.49x = 340.61 × 243.39
  4. Step 4: Simplify right side
    245.49x = 82,901.07
  5. Step 5: Solve for x
    x = 82,901.07/245.49
  6. Step 6: Final answer
    x = 337.70

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.