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Finding the Fourth Proportional to 245.86, 339.61 and 190.66

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Solution

The fourth proportional to 245.86, 339.61 and 190.66 is: 263.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.86 : 339.61 = 190.66 : x
  2. Step 2: Convert to fraction form
    245.86/339.61 = 190.66/x
  3. Step 3: Cross multiply
    245.86x = 339.61 × 190.66
  4. Step 4: Simplify right side
    245.86x = 64,750.04
  5. Step 5: Solve for x
    x = 64,750.04/245.86
  6. Step 6: Final answer
    x = 263.36

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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.